Fraction

Mr. Frog recently studied how to add two fractions up, and he came up with an evil idea to trouble you by asking you to calculate the result of the formula below:


As a talent, can you figure out the answer correctly?

The first line contains only one integer T, which indicates the number of test cases.

For each test case, the first line contains only one integer n ($n\leq 8$).

The second line contains n integers: $a_1, a_2,\cdots a_n (1\leq a_i \leq 10$).
The third line contains n integers: $b_1, b_2,\cdots ,b_n (1\leq b_i \leq 10)$.

For each case, print a line “Case #x: p q”, where x is the case number (starting from 1) and p/q indicates the answer.

You should promise that p/q is irreducible.

1
2
1 1
2 3

Case #1: 1 2

Here are the details for the first sample:
2/(1+3/1) = 1/2

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