A steel pipe is 18 meters long, and it takes 10 minutes to saw it into 3-meter sections. How many minutes would it take to saw it into 2 meter sections?
一根钢管长18米，要把它锯成每3米一段需要10分钟．如果把它锯成2米一段需要多少分钟．
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

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

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

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

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

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>