What is the area of square field whose side of length 20 m? Choose the correct option:
A) 200 sq m  B) 186 sq m  C) 586 sq m  D) 287 sq m  E) 400 sq m
20 * 20= 
<gadget id="calculator">20 * 20</gadget>
<output>400</output>
400 sq m   Answer: 400 sq m
<result>E</result>
What is the area of square field whose side of length 20 m?