TASK DEFINITION: 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.
PROBLEM: [[-37, 28, -2, -3], [-13, -6], [46, 11, -18, -31]]

SOLUTION: [-56, -6, -828]

PROBLEM: [[-22, -12, -43, -8], [-46, 34, -18, 11], [-48, -8], [-16, -7, 50, -38], [12, 46, 32], [0, -25, -37, -7, 24], [-41, 1, -10], [14, 13, -10]]

SOLUTION: [-2112, 28152, 384, 30400, 17664, 0, -10, -140]

PROBLEM: [[12, -28, -17], [46, 41, 40, -46], [9, 20], [-17, -24, 39], [20, 21, -30, 44], [50, -50, 33, -9, -10], [45, 4, 32], [-45, -1], [1, -43, 45, -12], [6, 25, -42], [-8, -46, -38]]

SOLUTION:
[-336, -84640, 20, -24, -26400, 25000, 128, 0, -12, -252, -13984]