public string Multiply(string num1, string num2)
{
var a = new MyBigInt(num1);
var b = new MyBigInt(num2);
var result = a.Multiply(b);
return(result.ToString());
}
public MyBigInt Multiply(MyBigInt secondOperator)
{
var sumsCount = secondOperator._list.Count;
var multiplies = new MyBigInt[sumsCount];
for (int i = 0; i < sumsCount; i++)
{
multiplies[i] = this.Multiply(secondOperator._list[i]);
}
var result = new List <int>();
var r = 0;
var digitsCount = sumsCount + multiplies[sumsCount - 1]._list.Count;
for (int i = 0; i < digitsCount; i++)
{
var currentSum = r;
var indexFound = false;
for (int j = 0; j < sumsCount; j++)
{
var actualIndex = i - j;
if (actualIndex >= 0 && actualIndex < multiplies[j]._list.Count)
{
currentSum += multiplies[j]._list[actualIndex];
indexFound = true;
}
}
if (indexFound)
{
result.Add(currentSum % 10);
r = currentSum / 10;
}
}
AddRest(result, r);
return(new MyBigInt(result));
}
