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.

[[-11, 18, -12, -30, 23], [-18, 33, 40, -18, 19], [-16, -5, -43], [-34, -49]]
[6480, 12960, -16, -34]