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: [[18, -11, -13], [-20, -21, 26], [40, 6, 3]]

SOLUTION: [18, -520, 240]

PROBLEM: [[21, -46], [37, 39, 40, -35, 28], [-24, -1, 22, 45], [9, -22, -40, 49], [-40, -17, 1, 43, 44], [-41, -41, -17, 5, 10], [48, 8], [38, 0], [47, 33, -40], [12, 42, 6], [-22, 5, -39, -29, -29], [-50, -21, 13, 1, 43], [-29, -48, 38], [2, -3]]

SOLUTION: [-46, 1120, -528, 880, -1760, 10, 384, 0, -40, 3024, -22, -50, -1824, 2]

PROBLEM: [[18, 20, 21], [47, -7, -46, -38, -9], [39, -40, -48, -12, 30], [9, 1, 21], [8, 35, 45, -34], [-36, 19], [5, 38, -15, 21, 12], [13, 6, 31, 7], [-6, -19, 2, -15], [49, -9, 8, 30]]

SOLUTION:
[360, 1748, -691200, 0, -272, -36, 456, 6, -12, 240]