#include<iostream.h>
#include<fstream.h>
long double n,d;
int a;
int main(void)
{
	ifstream f("next.in");
	ofstream g("next.out");
	f>>n;f>>d;
	if(d>n)
		g<<d;
	else
	{
		a=(int)n/d;
		g<<(a+1)*d;
	}
}