#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <functional>
using namespace std;
 
#define DARITF(op) [](double a, double b)->double{return a op b;}
#define DMAPARITF(op) {#op, DARITF(op)}
int main() {
	vector<double> results;
	map<string, function<double(double, double)>> functions = {
		DMAPARITF(+),
		DMAPARITF(-),
		DMAPARITF(*),
		DMAPARITF(/)
	};
	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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