import sys
input = sys.stdin.readline

P,Q,x,y=map(int,input().split())

# N mod P = x

for tests in range(10**5):
    N=y+tests*Q

    REV=int(str(N)[::-1])


    kk=pow(REV,P-2,P)*x%P

    # 10**y == kk

    # modが素数の場合

    import math
    a = 10
    b = kk

    mod = P

    SQ = int(math.sqrt(mod))+1
    Powdict = {pow(a,i,mod):i for i in range(SQ)} # Baby-Step

    A = pow(pow(a,mod-2,mod),SQ,mod)

    for i in range(SQ): # Giant-Step
        if b*pow(A,i,mod)%mod in Powdict:
            ANS = i*SQ+Powdict[b*pow(A,i,mod)%mod]
            break
    else:
        continue

    XX=str(REV)+"0"*ANS

    if len(XX)<10000:
        print(XX)
        break