n = int(input())
i = 0
while i < n:
try:
x, y = input().split(" ")
x = float(x)
y = float(y)
if y != 0:
print(x / y)
i += 1
else:
print('divisao impossivel')
except ValueError:
print('fomrmato digitado errado')
#https://pt.stackoverflow.com/q/482421/101
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