Answer
$$16,000 \ cm^2. $$
Work Step by Step
First, we have
$$(560 \ cm)(28.0 \ cm)= 15680 \ cm^2 $$
Now, round this product to two significant digits, which is the accuracy of the least accurate measurement. That is,
$$(560 \ cm)(28.0 \ cm)= 16,000 \ cm^2. $$
