Given the task definition and input, reply with output. 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.

[[-31, -34, -41, -15], [6, 48, 50, 48, 12], [-24, -46, 17, -24]]

[-34, 8294400, -26496]