import numpy as np

def solve(N, p):
    ps = np.ones(N+1)
    c = int(np.sqrt(N))+1
    for i in range(2, c):
        ind = np.arange(0, (N+1), i)
        ps[ind[2:]] *= (1 - p)
        _ind = ind[ind >= c * i]
        _ind = _ind[(_ind % i == 0) * (_ind != i**2)]
        ps[_ind] *= (1 - p)
    return ps[2:].sum()

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

print(solve(N, p))