A piece of wooden stick 12 meters long is sawed 3 times, what is the average length of each piece?
一段长12米的木棒，锯了3次，平均每段长多少米米．
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<result>3</result>