You are given two positive integers n and k. Print the k-th positive integer that is not divisible by n.
For example, if n=3, and k=7, then all numbers that are not divisible by 3 are: 1,2,4,5,7,8,10,11,13…. The 7-th number among them is 10
The first line contains an integer t (1≤t≤1000) — the number of test cases in the input. Next, t test cases are given, one per line.
Each test case is two positive integers n (2≤n≤10^9) and k (1≤k≤10^9).
For each test case print the k-th positive integer that is not divisible by n.
6 3 7 4 12 2 1000000000 7 97 1000000000 1000000000 2 1
10 15 1999999999 113 1000000001 1