from collections import defaultdict def factorization(n): arr = [] temp = n for i in range(2, int(-(-n**0.5//1))+1): if temp%i==0: cnt=0 while temp%i==0: cnt+=1 temp //= i arr.append([i, cnt]) if temp!=1: arr.append([temp, 1]) if arr==[]: arr.append([n, 1]) return arr x,a,y,b=map(int,input().split()) X=factorization(x) dx=defaultdict(int) dy=defaultdict(int) Y=factorization(y) for key,val in X: dx[key]=val*a for key,val in Y: dy[key]=val*b for key,val in dy.items(): if key not in dx: print('No') exit() dx[key]-=val if dx[key]<0: print('No') exit() print('Yes')