The task is to generate the correct answer for a given math problem.

Q: Problem: how many zeroes are there at the end of the number n , if n = 70 ! + 140 ! ?

A: 16
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Q: Problem: a can do a work in 15 days and b in 20 days . if they work on it together for 5 days , then the fraction of the work that is left is

A: 5 / 12
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Q: Problem: if x = 27 ^ 324 and y = 3 ^ 134 , what is the units digit of x / y ?

A:

****