It takes 6 minutes to saw a steel pipe into 3 sections. How many minutes will it take to saw a total of 6 sections?
一根钢管锯成3段需要6分钟，如果一共要锯成6段，还需要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">15 - 6</gadget>
<output>9</output>

<result>9</result>