If the width of a rectangular tablecloth is 8 decimeters and its length is 2 decimeters, what is the area in square decimeters?
一块长方形桌布的宽是8分米，比长短2分米，面积是多少平方分米．
<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<result>80</result>