A rope is 3 meters long, if 6 decimeters are cut off, the remaining rope is how many times the length of the cut rope.
一根绳子长3米，剪去6分米，剩下的绳子是剪去的绳子的多少倍．
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 - 6</gadget>
<output>24</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<result>4</result>