It takes 12 minutes to saw a log into 3 sections, and how many minutes to divide each section into two equal parts.
将一根圆木锯成3段要12分，再将每段平分成两份，还要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>