#include <stdio.h>
#include <math.h>
int main()
{
    float P,R,N,emi;
    scanf("%f %f %f",&P,&R,&N);
    if(P<=0 || R<=0 || N<=0){
        printf("Invalid input");
        return 0;
    }
    R=R/(12*100);
    emi=(P*R*pow(1+R,N))/(pow(1+R,N)-1);
    printf("%.2f",2f);
    
}