MOD = 10**9 + 7

p, k = map(int, input().split())

if k == 0:
    numerator = (pow(10, p-1, MOD) + (p - 1)) % MOD
else:
    numerator = (pow(10, p-1, MOD) - 1) % MOD

inv_p = pow(p, MOD-2, MOD)
ans = (numerator * inv_p) % MOD

print(ans)