What is the difference between (1/4) minus (1/5) and divided by 50?
(1/4)减去(1/5)的差除以50，结果是多少？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) / 50</gadget>
<output>1/1_000 = around 0.001</output>

<result>1/1_000 = around 0.001</result>