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# -*- coding:utf8 -*-
from decimal import *
getcontext().prec = 100
def prBob(s):
    ans = []
    while s != 1.0:
        if str(s).rstrip('0')[-1] != '5':
            print 'NO'
            break
        s = (s - int(s)) * Decimal('2.0')
        ans.append(str(int(s)))
    else:
        print '0.' + "".join(ans)
T = int(raw_input())
while T > 0:
    T -= 1
    s = Decimal(raw_input())
    prBob(s)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX