Fast way to find the next multiple of a number

I need to find the first multiple for a number starting from a base number. For example: The first multiple of 3 from 7 is 9. My first attempt was to do this:

multiple = baseNumber
while(multiple%number !=0 )
    multiple++

At the end, "multiple" will have the first multiple of number after baseNumber. The problem is that when number becomes too large, the number of iterations becomes too many. So my question is: is there a faster way to do this?