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: [[-35, 48, -49, -45], [2, -17, 9, 14, -15], [-15, 2, -21, 29]]

[-3704400, 64260, 18270]