t=int(input())
for i in range(0,t):
N=int(input())
s=0
for i in range(1,N+1):
s=s+(N/i)
print(round(s,2))
dD1pbnQoaW5wdXQoKSkKZm9yIGkgaW4gcmFuZ2UoMCx0KToKCU49aW50KGlucHV0KCkpCglzPTAKCWZvciBpIGluIHJhbmdlKDEsTisxKToKCQlzPXMrKE4vaSkKCXByaW50KHJvdW5kKHMsMikp