Untitled

#include<stdio.h>
int main(void){
    double x,y,z;
    char c;
    scanf("%lf%c%lf",&x,&c,&y);
    if(c=='+'){
        z=x+y;
    }
    if(c=='-'){
        z=x-y;
    }
    if(c=='*'){
        z=x*y;
    }
    if(c=='/'){
        z=x/y;
    }
    printf("%.3f\n",z);
    return 0;
}