C :

#include<stdio.h>
int main(){
	double f,c1;
	int c;
	scanf("%d",&c);
	c1=(double)c;
	double k=9.0/5.0;
	f=k*c+32;
	printf("%.2f",f);
	return 0;
}

C++ :

#include<iostream>
#include<iomanip>
using namespace std;
int main(){
	int c;
	cin>>c;
	double f=9.0/5*c+32;
	
	
	cout<<setiosflags(ios::fixed)<<setprecision(2)<<f<<endl;

}

Python :

c=int(input())
f=9/5*c+32
print('%.2f'% f)