#include "stdio.h"
int main(void)
{
double bj,nll;
int years;
double lx;
printf("請輸入本金,存款年數,年利率（以空格隔開）:\n");
scanf("%lf%d%lf",&bj,&years,&nll);
lx=bj*nll*0.8;
printf("到%d年,實際利息為%.1lf元.",2007+years,lx);
return 0;
}