(1/5) kilometers is ((())/(())) of (1/2) kilometers.
(1/5)千米是(1/2)千米的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<result>2/5 = around 0.4</result>