Saw 12 meters long wood 3 times, what is the average length of each section?
把12米长木锯3次，平均每段长多少分米？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<result>30</result>