#include <cmath>
#include <iostream>
#include <iomanip>
 
class Pi {
public:
    Pi() {}
 
    operator float() const {
        return std::atan(1.0f)*4.0f;
    }
 
    operator double() const {
        return std::atan(1.0)*4.0;
    }
};
 
const Pi pi;
 
template<typename T>
T operator*(const Pi& pi, T&& other)
{
	return static_cast<T>(pi) * std::forward<T>(other);
}
 
int main() {
    std::cout << std::setprecision(50) << pi * 1.0f << std::endl;
    std::cout << std::setprecision(50) << pi * 1.0  << std::endl;
}

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