Definition: In this task you will be given a list of lists, of numbers. For every inner list, you should multiply every number in that list and put the results in your answer. The output should be a list of numbers with the same length as the number of the lists in the input list.
Input: [[40, -49, -37], [34, 28, 37, -23, 36], [8, -21, 50, 42], [-37, 42]]

[72520, -29165472, -352800, -1554]