/*#include<stdio.h>
int main()
{
int x,y;
int a, b;
int i, j;
int q, w;
scanf("%d %d", &x, &y);
scanf("%d %d", &a, &b);
for(i=0; i<x; i++)
{
for(q=0; q<a; q++)
{
for(j=0; j<y; j++)
{
for(w=0; w<b; w++)
{
if((i+j)%2==0)
{
printf("X");
}
else
{
printf(".");
}
}
}printf("\n");
}
}
}
*/
/*#include<stdio.h>
int main()
{
int n;
int Ar[10000] = {0};
Ar[0] = Ar[1] = 1;
int i, j;
scanf("%d", &n);
for(i=2;i<n;i++)
{
Ar[i] = Ar[Ar[i - 1] - 1] + Ar[i - Ar[i - 1]];
}
printf("%d", Ar[n-1]);
return 0;
}*/
/*#include<stdio.h>
int main()
{
int n, m, a, b, i;
int k[101] = {0}, t = 0;
scanf("%d %d", &n, &m);
for(i=0;i<m;i++)
{
scanf("%d %d", &a, &b);
k[a]++;
k[b]++;
}
for(i=1;i<=n;i++)
{
if(k[i] == 0)
{
printf("NO");
}
else if(k[i]%2==1){
t++;
if(k==0||k==2)
{
printf("YES");
}
else{
printf("NO");
}}
}
}*/
# include <stdio.h>
int main()
{
int n,k;
scanf("%d %d", &n, &k);
printf("%d", (n+n/k));
}