Divide (4/5) yuan into 4 parts on average, each part accounts for ((())/(())), how much is each part.
把(4/5)元钱平均分成4份，每份占((())/(()))，每份是多少元．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(4/5) * (1/4)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>