T = int(input()) 
A = [int(input()) for _ in range(T)]

K = 10 **6
dp = [0] *(K+7)

s1 = 1/12
s2 = 2/12
s3 = 3/12
s4 = 1/12
s5 = 3/12
s6 = 2/12

for i in range(K):
    dp[i+6] = dp[i] * s6 + dp[i+1] * s5 +dp[i+2] * s4 + dp[i+3] *s3 + dp[i+4] *s2 + dp[i+5] * s1 + 1


for i in A:
    print(dp[i+5])