include<stdio.h>

int main() {

int b;
double a,c;
float sum = 0;
int flag = 0;
scanf("%lf %d %lf",&a,&b,&c);
for(flag = 0;flag < b;flag++)
{
	c = c*(1 + a);
}
printf("%lf",c);
return 0;

}

建议以后直接上longlong