It takes 4 minutes to cut a cable into 2 sections, how many minutes will it take to cut it into 5 sections?
把一根电缆截成2段需要4分钟，如果截成5段需要多少分钟．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">4 / 1</gadget>
<output>4</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>