#import<fstream>
#import<string>
using namespace std;string s;long long d,r,i;main(){ifstream I("next.in");ofstream O("next.out");I>>s>>d;for(i=0;i<s.size();i++)r=(r*10+s[i]-'0')%d;d-=(!r)?d:r;for(i=s.size()-1;i>=0;i--)d+=s[i]-'0',s[i]=char(d%10+'0'),d/=10;if(d)O<<d;O<<s;}