public virtual dynamic CompoundInterestMethod(double principal, double rate, int time, double year)
{
// (1 + r/n)
double body = 1 + _IMaths.Divide(rate, time);
// nt
double exponent = _IMaths.Multiply2No(time, year);
// p(1+r/n)^nt
return(principal * Math.Pow(body, exponent));
}