package org.example;

public class Multiply {

public String multiply(String num1, String num2) {

int totalSum = 0;

for (int i = num2.length() - 1; i >= 0; i--) {

int curr = num2.charAt(i) - '0';

int currWeight = power(num2.length() - 1 - i);

int sum = 0;

for (int j = num1.length() - 1; j >= 0; j--) {

int currNum1 = num1.charAt(j) - '0';

int currWeightNum1 = power(num1.length() - 1 - j);

int temp = currNum1 * curr * currWeightNum1;

sum += temp;

}

int temp2 = sum * currWeight;

totalSum += temp2;

}

return String.valueOf(totalSum);

}

private int power(int n) {

int weight = 1;

for (int i = 0; i < n; i++) {

weight *= 10;

}

return weight;

}

}