int main()
{
int Loan,Year,i;
double interest_rate, N, denominator=0, numerator=1,d=1;
printf("initial_rent year interest(%%) \n");
scanf("%d %d %lf", &Loan, &Year, &interest_rate );
N = 1+interest_rate/100;
for( i=0; i<Year; i++){
denominator += d;d *= N;numerator *= N;}
printf("Payment per year is : %d.", (int)(Loan*numerator/denominator+.5) );
}