#I don't know why i start from lk+7. If anyone knew about that, please notify me.

import sys

n,k = sys.stdin.readline().split()
n = int(n)
lk = len(k)
res = 1

for i in range(lk+7,-1,-1):
    t = n - i*lk
    if t>0: res *= t

sys.stdout.write("%d\n"%res)

Edited by author 16.07.2021 09:03