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, -25, -15], [-3, -36, 22], [47, 30, 15, 22], [-3, -49, 28, 47], [37, -29, -29, 15], [0, -39, 3, 42], [-31, -8, -20, -21]]

[-11625, 2376, 465300, 193452, 466755, 0, 104160]