dp=[0]*1000001
p = [1/12, 2/12, 3/12, 1/12, 3/12, 2/12]

dp[0] = 0
for i in range(1, 1000001):
    for j in range(1, 7, 1):
        dp[i] += (dp[i-j]*p[j-1])
    dp[i] += 1
T=int(input())
for _ in range(T):
    n = int(input())
    print(u"{0:f}".format(dp[n]))