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: [[5, 18], [24, -31, 42], [-42, 50, 44, 17, -48]]

[90, -31248, 75398400]