It takes (2/5) minutes to saw a steel pipe into 2 sections, how many minutes will it take to saw it into 5 sections?
一根钢管锯成2段需要(2/5)分钟，如果锯成5段需要多少分钟．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) / 1</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">(2/5) * 4</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>