Answer: 2039.3 centimeters
Step-by-step explanation: To convert inches to centimeters, all you have to do is multiply the number of inches by 2.54 (what 1-inch converts to), for this problem that would be 20*2.54=50.18 and 16*2.54=40.64. Then, multiply the products (50.18*40.64) and you get 2039.31532, rounded up to 2039.3.
Hope this helps!