It takes 2 minutes to saw a water pipe into two sections, and how many minutes to saw it into 6 sections.
一根水管锯成两段要2分钟，锯成6段要多少分钟．
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<result>10</result>