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.

Let me give you an example: [[7, -3, -3, 11], [-6, -6, -5, 2], [-8, 4, -3]]
The answer to this example can be: [0, 72, -32]
Here is why: The first inner list has no even integers, so the first number in the output is 0. The second list has -6, -6, 2 for even integers so the second output is 72. The third list has -8, 4 as even numbers so the third output is -32. This is a good example.

OK. solve this:
[[31, 40, -3, -48, 21], [-33, -10, 39, -35], [3, 17, -20, -39, -23], [19, -38, -20, 31], [46, 3], [-27, 19, 21], [38, 24, 32, 39, 12], [-16, -48], [-2, 47, 13, 39, 27], [29, 10, 15, -19], [-1, -5], [-11, -4, -50, -13, -9], [46, -27, -40], [-43, 1, -23, -40, -31], [0, -22, 1, 18, -40]]
Answer:
[-1920, -10, -20, 760, 46, 0, 350208, 768, -2, 10, 0, 200, -1840, -40, 0]