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: [[38, -45, -42, -17, 10], [5, 43, 49], [-32, 27, -31], [-12, -24, 40]]

[-12209400, 10535, 26784, 11520]