#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <functional>
using namespace std;
 
double add(double a, double b){
	return a+b;
}
double subtract(double a, double b){
	return a-b;
}
double multiply(double a, double b){
	return a*b;
}
double divide(double a, double b){
	return a/b;
}
 
int main() {
	vector<double> results;
	map<string, function<double(double, double)>> functions = {
		{"+", add},
		{"-", subtract},
		{"*", multiply},
		{"/", divide}
	};
	string in_function;
	double a, b;
	while(cin>>a>>in_function>>b)
		results.push_back(functions[in_function](a, b));
 
	for(auto result : results)
		cout << result << " ";
	return 0;
}

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