import math
def factorize(n):
    d = {}
    temp = int(math.sqrt(n))+1
    for i in range(2, temp):
        while n%i== 0:
            n //= i
            if i in d:
                d[i] += 1
            else:
                d[i] = 1
    if d == {}:
        d[n] = 1
    else:
        if n in d:
            d[n] += 1
        elif n != 1:
            d[n] =1
    return d

x,a,y,b = map(int,input().split())
if y == 1:
    print('Yes')
    exit()
if x == 1:
    if y != 1:
        print('No')
    else:
        print('Yes')
    exit()
C = factorize(x)
D = factorize(y)
for k, v in D.items():
    if k not in C:
        print('No')
        exit()
    else:
        u = C[k]
        if (u*a)%(v*b) == 0:
            continue
        else:
            print('No')
            exit()
print('Yes')