Divide a steel bar into 5 sections on average, of which 3 sections account for the total length of the steel bar.
把一个钢条平均分成5段，其中的3段占钢条全长的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 3</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>