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: [[48, 6, -31, 14, 7], [5, -40, -23], [-18, -45, 11, 13]]

[-874944, 4600, 115830]