Divide 4 kg of chocolate into 5 equal parts, each part is 4 kg ((())/(())), how many kg is each part.
把4千克的巧克力平均分成5份，每份是4千克的((())/(()))，每份是多少千克．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>