C :

#include <stdio.h>
void main()
{
	int n,m;
	double p;
	scanf("%d %d",&n,&m);
	if(m>=5)
	{
		p=n*0.0475*m+n;
	}else if(m==3||m==4){
		p=n*0.0425*m+n;
	}else if(m==2){
		p=n*0.0375*m+n;
	}else if(m==1){
		p=n*0.0325*m+n;
	}
	printf("%.1f",p);
	  
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
    int n ,m ;
    double s;
    cin>>n>>m;
    if(m==1){
    	s=n*0.0325*m+n;
	}else if (m==2){
		s=n*0.0375*m+n;
	}else if (m==3 || m==4){
		s=n*0.0425*m+n;
	}else{
		s=n*0.0475*m+n;
	}
	cout<<fixed<<setprecision(1)<<s<<endl;
}

Python :

a,b=map(int,input().split())
if b==1:
    S=a*(1+0.0325)
if b==2:
    S=a*0.0375*2+a
if 3<=b<=4:
    S=a*0.0425*b+a
if 5<=b:
    S=a*0.0475*b+a
print('%.1f'% S)