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.

[[-10, 3, 30], [-31, -38, 42, -27], [7, 3, -22, -31, 30], [35, -13], [11, -40, -42, -14, -50]]
[-300, -1596, -660, 0, 1176000]