#include<stdio.h>
int main(){
int n1;
scanf("%f",&n1);
char ch;
scanf("%c",&ch);
int n2;
scanf("%f",&n2);
switch(ch){
case '+':
printf("%f",n1+n2);
break;
case '-':
printf("%f",n1-n2);
break;
case '*':
printf("%f",n1*n2);
break;
case '/':
printf("%f",n1/n2);
break;
}
return 0;
}