If it takes 2 minutes to cut a piece of wood, how many minutes will it take to saw the piece of wood into 15 pieces?
把一根木头锯断要2分钟，把这根木头锯成15段要多少分钟．
<gadget id="calculator">15 - 1</gadget>
<output>14</output>

<gadget id="calculator">2 * 14</gadget>
<output>28</output>

<result>28</result>