An apple has more mass than an orange (1/5), so the mass of an orange is that of an apple ((())/(())).
苹果的质量比橘子多(1/5)，那么橘子的质量是苹果的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / (6/5)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>