5 1/8 x 16. Okay turn 5 1/8 into a huge fraction, and that will be 41/8 times 16. Now turn 16 into a fraction over 8 (16 x 8 is 128). Now you have 41/8 x 128/8 which equals to 5,248/64, and once you divide those numbers together, you will get 82 as your final answer