#include <stdio.h>
int main()
{
    float CCse, CMat, CEng;
    float Cgpa;
    scanf("%f %f %f", &CCse, &CMat, &CEng);
    Cgpa= ((CCse*4.5)+ (CMat*3.0)+ (CEng*3.0))/9.5;
    printf("CGpa= %.2f", Cgpa);
    return 0;
}