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.

[[41, -40, 39], [7, -9], [-8, 9, -7, -12, 7]]
[-40, 0, 96]