It takes 2 minutes to saw a piece of wood, but if it is cut into 10 pieces, how many minutes will it take in total?
锯一木条，锯一次需要2分钟，若锯成10小段，一共要用几分钟？
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<result>18</result>