It takes 5 minutes to saw a steel pipe into 3 sections, how many minutes will it take to saw it into 9 sections?
一根钢管锯成3段要5分钟，如果把它锯成9段要多少分钟．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">(5/2) * 8</gadget>
<output>20</output>

<result>20</result>