A piece of iron wire 12 decimeters long is cut 3 times, what is the average length of each section?
一根12分米长的铁丝，剪了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>

<result>3</result>