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: [[-28, -1, -35, 10, -26], [-50, -7], [5, 16, -50, -5], [-7, 39, 17, -4]]

[254800, 350, 20000, 18564]