N, p = input().split()
N = int(N)
p = int(p.replace(".", "")) / 100000

ans = 0.0
dp = [1] * (N + 1)
for i in range(2, N + 1):
    d = dp[i]
    ans += (1.0 - p) ** (d - 1)
    for x in range(2 * i, N + 1, i):
        dp[x] += 1
print(ans)