#include <iostream>

int multiplication(int a, int b) {
  int answer = 0;
  for (int i = 0; i < a; i++) {
    answer += b;
  }
  if (answer != a * b) {
    std::cout << "There is a mistake in your code!" << std::endl;
    return -1;
  } else
    return answer;
}

int main() {
  int a, b;
  std::cout << "Enter number a" << std::endl;
  std::cin >> a;
  std::cout << "Enter number b" << std::endl;
  std::cin >> b;
  std::cout << multiplication(a, b) << std::endl;
  return 0;
}