A square with side lengths of decimeters has an area of 1 square meter.
边长是多少分米的正方形，它的面积是1平方米．
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<result>10</result>