It takes 3 minutes to cut a piece of wood into 10 sections, how many minutes will it take to finish sawing?
把一根木头据成10段，每锯一次要3分钟，锯完一共要用多少分钟？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">3 * 9</gadget>
<output>27</output>

<result>27</result>