Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: nd the area of trapezium whose parallel sides are 20 cm and 18 cm long , and the distance between them is 12 cm ?
228 cm 2
120 square centimeters.