def prime_factorization(w,d):
    cnt = 2
    while w > 1:
        if cnt > int(w ** (1/2)):
            d[w] += 1
            break
        while w % cnt == 0:
            d[cnt] += 1
            w //= cnt
        cnt += 1
x,a,y,b = map(int,input().split())
from collections import defaultdict
d1 = defaultdict(int)
d2 = defaultdict(int)
prime_factorization(x,d1)
prime_factorization(y,d2)
ans = "Yes"
def kake(d,xx):
    for k in d.keys():
        d[k] *= xx
# print(d1,d2)
kake(d1,a)
kake(d2,b)
for k in d2.keys():
    if k in d1:
        if d1[k] < d2[k]:
            ans = "No"
    else:
        ans = "No"
print(ans)