#include <stdio.h> int main() { double x = 0; double y = 0; char a = 0; scanf("%lf%c%lf", &x, &a, &y); if (a == '+') { printf("%.4lf%c%.4lf=%.4lf", x, a, y, x+y); } else if (a == '-') { printf("%.4lf%c%.4lf=%.4lf", x, a, y, x-y); } else if (a == '*') { printf("%.4lf%c%....