# coding: utf-8
#yuki_76

dp=[0 for i in xrange(1000100)]
os=6

def solve(x):
 s=[0 for i in xrange(7)]
 s[1]=1.0/12;
 s[2]=2.0/12;
 s[3]=3.0/12;
 s[4]=1.0/12;
 s[5]=3.0/12;
 s[6]=2.0/12;
 for i in xrange(1,1000008):
	dp[i+os]=1+(dp[i+os-1]*s[1]+dp[i+os-2]*s[2]+dp[i+os-3]*s[3]+dp[i+os-4]*s[4]+dp[i+os-5]*s[5]+dp[i+os-6]*s[6]);
 return dp[x+os]

t=int(raw_input())
for i in xrange(t):
 x=int(raw_input())
 print solve(x)