The length of the rectangle is 2 decimeters, the width is 3 centimeters, what is the area in square centimeters
长方形的长是2分米，宽是3厘米，面积是多少平方厘米
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>