Devise a flowchart for a computer program to receive 20 numbers, and output the product (i.e. multiplication) of their remainder to 3.

For example if the numbers are like 31, 32, 52, 61, 5,..., the program should output the result of 1*2*1*1*2..., because the remainders of 31, 32, 52, 61, 5 divided by 3 are 1, 2, 1, 1, 2 respectively.

Important note: you are not allowed to use either arrays or strings.

Submit the flowchart together with pre- and post- conditions as an image file