a,b=map(int,input().split()) n=0 if a%b==0: while a%b!=0: n+=1 print(n) else: print(a//b+a)

115

a,b=map(int,input().split())
n=0
if a%b==0:
while a%b!=0:
n+=1
print(n)
else:
print(a//b+a)