C :

#include <stdio.h>
void main()
{
	int n;
	double p;
	scanf("%d",&n);
	if(n>=10)
	{
		p=n*2;
	}else{
		p=n*2.2;
	}
	printf("%.1f",p);
}

C++ :

#include <bits/stdc++.h>
using namespace std;
int main(){
   int a;
   double b;
   cin>>a;
   if(a >= 10){
   	  b = a * 2;
   }else{
   	  b = a * 2.2;
   }
   cout<<fixed<<setprecision(1)<<b<<endl;
   return 0;
}

Python :

n=int(input())
s=0
if n>=10 and n<=100:
    s=n*2
elif n<10 and n>0:
    s=n*2.2
print('%.1f' %s)