RP = [6,4,12,4,6,12]
N = 10**6
E = [0] * (N+1)

for i in range(1, N+1):
    tmp = 0
    for j in range(6):
        tmp += E[i - j - 1] / RP[5-j]
    tmp += 1
    E[i] = tmp

T = int(input())
for _ in range(T):
    N = int(input())
    print(E[N])