Mengapa perhitungan di dalam script berikut tidak sesuai dengan perhitungan manual?

package com.example.rectifiercalculator

import android.content.Intent import android.os.Bundle import android.widget.Button import android.widget.EditText import android.widget.TextView import android.widget.Toast import androidx.activity.enableEdgeToEdge import androidx.appcompat.app.AppCompatActivity import androidx.core.view.ViewCompat import androidx.core.view.WindowInsetsCompat import org.w3c.dom.Text import kotlin.math.roundToInt import java.math.BigDecimal import java.math.RoundingMode

class AuditPowerActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_audit_power)

    // Retrieve phase type from intent
    val phaseType = intent.getIntExtra("PHASE_TYPE", 0)
    val tvPhaseTypeAudit = findViewById<TextView>(R.id.tvPhaseTypeAudit)

    // Display phase type
    tvPhaseTypeAudit.text = if (phaseType == 1) "Phase Type: 1 Phasa" else "Phase Type: 3 Phasa"

    // Input fields
    val etCapMCBPLN = findViewById<EditText>(R.id.etCapMCBPLN)
    val etLoadCurrent = findViewById<EditText>(R.id.etLoadCurrent)
    val etVoltageFloat = findViewById<EditText>(R.id.etVoltageFloat)
    val etTotalBatteryCapacity = findViewById<EditText>(R.id.etTotalBatteryCapacity)
    val etBatteryCurrentLimit = findViewById<EditText>(R.id.etBatteryCurrentLimit)
    val etVoltRn = findViewById<EditText>(R.id.etVoltRn)
    val etVoltSn = findViewById<EditText>(R.id.etVoltSn)
    val etVoltTn = findViewById<EditText>(R.id.etVoltTn)
    val etQtyRectifierModuleR = findViewById<EditText>(R.id.etQtyRectifierModuleR)
    val etQtyRectifierModuleS = findViewById<EditText>(R.id.etQtyRectifierModuleS)
    val etQtyRectifierModuleT = findViewById<EditText>(R.id.etQtyRectifierModuleT)
    val etCosPhi = findViewById<EditText>(R.id.etCosPhi)
    val etRectifierEfficiency = findViewById<EditText>(R.id.etRectifierEfficiency)
    val etTotalLoadNonRectifierPhasaR = findViewById<EditText>(R.id.etTotalLoadNonRectifierPhasaR)
    val etTotalLoadNonRectifierPhasaS = findViewById<EditText>(R.id.etTotalLoadNonRectifierPhasaS)
    val etTotalLoadNonRectifierPhasaT = findViewById<EditText>(R.id.etTotalLoadNonRectifierPhasaT)
    val btnCalculateAudit = findViewById<Button>(R.id.btnCalculateAudit)

    btnCalculateAudit.setOnClickListener {
        try {
            // Validate and parse inputs
            val capMCBPLN = etCapMCBPLN.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Cap MCB PLN harus diisi!")
            val loadCurrent = etLoadCurrent.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Load Current harus diisi!")
            val voltageFloat = etVoltageFloat.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Voltage Float harus diisi!")
            val totalBatteryCapacity = etTotalBatteryCapacity.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Total Battery Capacity harus diisi!")
            val batteryCurrentLimit = etBatteryCurrentLimit.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Battery Current Limit harus diisi!")
            val voltRn = etVoltRn.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Tegangan R-N harus diisi!")
            val voltSn = etVoltSn.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Tegangan S-N harus diisi!")
            val voltTn = etVoltTn.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Tegangan T-N harus diisi!")
            val qtyRectifierModuleR = etQtyRectifierModuleR.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Jumlah Rectifier Module R harus diisi!")
            val qtyRectifierModuleS = etQtyRectifierModuleS.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Jumlah Rectifier Module S harus diisi!")
            val qtyRectifierModuleT = etQtyRectifierModuleT.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Jumlah Rectifier Module T harus diisi!")
            val cosPhi = etCosPhi.text.toString().toDoubleOrNull() ?: throw IllegalArgumentException("Cos φ harus diisi!")
            val rectifierEfficiency = etRectifierEfficiency.text.toString().toDoubleOrNull()?.div(100) ?: throw IllegalArgumentException("Rectifier Efficiency harus diisi!")
            val totalLoadNonRectifierR = etTotalLoadNonRectifierPhasaR.text.toString().toDoubleOrNull() ?: 0.0
            val totalLoadNonRectifierS = etTotalLoadNonRectifierPhasaS.text.toString().toDoubleOrNull() ?: 0.0
            val totalLoadNonRectifierT = etTotalLoadNonRectifierPhasaT.text.toString().toDoubleOrNull() ?: 0.0

            // Calculations
            val totalModules = qtyRectifierModuleR + qtyRectifierModuleS + qtyRectifierModuleT
            val dayaTanpaCharging = (((((loadCurrent / totalModules) + 1.5) * totalModules) * voltageFloat) / rectifierEfficiency / cosPhi).toInt()
            val dayaChargingBattery = ((((((loadCurrent + (batteryCurrentLimit / 100 * totalBatteryCapacity)) / totalModules) + 1.5) * totalModules) * voltageFloat) / (rectifierEfficiency * cosPhi)).toInt()
            val totalCurrentR = (((((((loadCurrent + (batteryCurrentLimit / 100 * totalBatteryCapacity)) / totalModules) + 1.5) * qtyRectifierModuleR) * voltageFloat) / (rectifierEfficiency * cosPhi)) / voltRn + totalLoadNonRectifierR).toInt()
            val totalCurrentS = (((((((loadCurrent + (batteryCurrentLimit / 100 * totalBatteryCapacity)) / totalModules) + 1.5) * qtyRectifierModuleS) * voltageFloat) / (rectifierEfficiency * cosPhi)) / voltSn + totalLoadNonRectifierS).toInt()
            val totalCurrentT = (((((((loadCurrent + (batteryCurrentLimit / 100 * totalBatteryCapacity)) / totalModules) + 1.5) * qtyRectifierModuleT) * voltageFloat) / (rectifierEfficiency * cosPhi)) / voltTn + totalLoadNonRectifierT).toInt()
            val occMCBPhaseR = (totalCurrentR / capMCBPLN).roundToInt()
            val occMCBPhaseS = (totalCurrentS / capMCBPLN).roundToInt()
            val occMCBPhaseT = (totalCurrentT / capMCBPLN).roundToInt()
            val dayaTotalGabungan = dayaTanpaCharging + dayaChargingBattery

            // Determine OK or OVERLOAD
            val statusR = if (occMCBPhaseR <= 100) "OK" else "OVERLOAD"
            val statusS = if (occMCBPhaseS <= 100) "OK" else "OVERLOAD"
            val statusT = if (occMCBPhaseT <= 100) "OK" else "OVERLOAD"

            // Build result text
            val resultText = if (phaseType == 1) {
                """
                1 Phasa Results:
                Daya Tanpa Charging Battery: $dayaTanpaCharging Watt
                Daya + Charging Battery: $dayaTotalGabungan Watt
                Total Current Phase R: $totalCurrentR A AC
                Occ MCB Phase R: $occMCBPhaseR % $statusR
                """.trimIndent()
                    } else {
                        """
                3 Phasa Results:
                Daya Tanpa Charging Battery: $dayaTanpaCharging Watt
                Daya + Charging Battery: $dayaTotalGabungan Watt
                Total Current Phase R: $totalCurrentR A AC
                Total Current Phase S: $totalCurrentS A AC
                Total Current Phase T: $totalCurrentT A AC
                Occ MCB Phase R: $occMCBPhaseR % $statusR
                Occ MCB Phase S: $occMCBPhaseS % $statusS
                Occ MCB Phase T: $occMCBPhaseT % $statusT
                """.trimIndent()
            }

            // Navigate to result activity
            val intent = Intent(this, AuditResultActivity::class.java)
            intent.putExtra("RESULT_TEXT", resultText)
            startActivity(intent)

        } catch (e: Exception) {
            Toast.makeText(this, e.message, Toast.LENGTH_LONG).show()
        }
    }
}

}