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, 49], [6, 8], [5, 4, -7], [-42, -42, 39, 26]]

[1715, 48, -140, 1788696]