#include<stdio.h>
int main()
{
	int n,k,i,x=1,y=1,sum1=0,sum2=0,t,g;
	double oi,io;
	scanf("%d %d",&n,&k);
	int a[n],b[n],c[n];
	for(i=n;i>=1;i--)
		a[i]=i;
	for(i=1;i<=100;i++)
	{
		if(a[i]%k == 0)
		{
			b[x]=a[i];
			x++;
		}
		else
		{
			c[y]=a[i];
			y++;
		}
	}
	for(i=1;i<x;i++)
	{
		if(b[i]>0)
			sum1=sum1+b[i];
	}
	for(i=1;i<y;i++)
	{
		if(c[i]>0)
			sum2=sum2+c[i];
	}
	x--;
	y--;
	g=sum1*10/x;
	t=sum2*10/y;
	oi=g+0.5;
	io=t+0.5;
	printf("%.1f %.1f",oi/10,io/10);
	return 0;
}