import math

def solve(N, p):
    ps = [1 for i in range(N + 1)]
    c = int(math.sqrt(N)) + 1
    for i in range(2, c):
        for j in range(i * 2, N + 1, i):
            ps[j] *= (1 - p)
        for k in range(c, int((N / i) + 1)):
            ps[k * i] *= (1 - p)
    return sum(ps[2:])

N, p = input().split()
N = int(N)
p = float(p)

print(solve(N, p))