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: [[-23, -40], [-40, -44], [-18, -11, -34, 50, -31], [13, 19, 22, -35]]

[920, 1760, 10434600, -190190]