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: [[9, -42, -5], [16, -7, 12, 23], [0, -3], [43, -2]]

[1890, -30912, 0, -86]