import collections
def prime_factorize(n):
    a = []
    while n % 2 == 0:
        a.append(2)
        n //= 2
    f = 3
    while f * f <= n:
        if n % f == 0:
            a.append(f)
            n //= f
        else:
            f += 2
    if n != 1:
        a.append(n)
    return a
X,A,Y,B = map(int, input().split())
XP = prime_factorize(X)
YP = prime_factorize(Y)
XC = collections.Counter(XP)
YC = collections.Counter(YP)
for k,v in XC.items():
    XC[k]*=A
for k,v in YC.items():
    YC[k]*=B
if not YC-XC:
    print('Yes')
else:
    print('No')