If it takes 6 minutes to saw 3 sections of a piece of wood, how many minutes will it take to saw 6 sections?
一段木头锯3段要6分钟，那么锯6段要多少分钟．
<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>

<result>15</result>