#include<iostream>
#include<cstdio>
#include<cmath>

using namespace std;
double  r,x,p;
//تنبëت¾ہ‎£؛1 100 5
//تن³ِ 105.10 
int main() {
	cin>>r>>x>>p;
	double a=(100+r)/100;
	printf("%.2lf\n",x*pow(a,p));
	
	//printf("%d\n",pow(2,2));
	//printf("%.2lf\n",pow(2,2));
	return 0;
}