You will be given a definition of a task first, then some input of the task.
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.

[[-21, 46, -20], [13, 44, -12, 36, -47], [41, 11, -16], [2, 29, 1, -43], [5, -46, 8], [-38, -29]]
Output:
[-920, -19008, -16, 2, -368, -38]