#3858. Number Transformation
Teacher Mai has an integer x.
He does the following operations k times. In the i-th operation, x becomes the least integer no less than x, which is the multiple of i.
He wants to know what is the number x now.
There are multiple test cases, terminated by a line "0 0".
For each test case, the only one line contains two integers x,k(1<=x<=10^10, 1<=k<=10^10).
For each test case, output one line "Case #k: x", where k is the case number counting from 1.
Case #1: 2520
Case #2: 2600
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