class Main{
    void entry Main(){
        Problem2([3,5,7,2])
    }

    int Problem2(int[] numbers){
        var prod = 0;
        int index = 0;
        while(index < numbers.lenght){
            int number = numbers[index];
            prod *= number;
        }
        index = index + 1;
        return prod;
    }

    void Problem3(int[] numbers1, int[] numbers2){
        while(index < numbers.lenght){
            numbers1[index] = numbers1[index] + numbers2[index];
            index = index + 1;
        }
    }
}