In this task you will be given a list, of lists, of integers. For every inner list contained in the input list, you should multiply every even number in that list. The output should be a list of integers with the same length as the number of lists in the input list. If there are no even numbers in an inner list you should output 0 for that list.
Q: [[-24, -6, -8, 18, 50], [-15, 37, 46], [32, 2, -44, 46, -15]]
A: 
[-1036800, 46, -129536]