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.