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: [[-31, -45], [29, -10, 39, -12, -46], [-17, -7, 35], [-7, -45, 17, -17]]

[1395, -6243120, 4165, -91035]