Use a 2-meter-long piece of wood to make 4 legs of a chair, how many decimeters are each leg long?
用一根2米长的木头，来制作一张椅子的4条腿，每条腿长多少分米？
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<result>5</result>