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, 1, -26], [-35, 46], [-10, -21, -26, -40, 6]]

[-806, -1610, 1310400]