((2/5)+(2/5)*99)/(2/5).
((2/5)+(2/5)*99)/(2/5)．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 99</gadget>
<output>198/5 = around 39.6</output>

<gadget id="calculator">(2/5) + (198/5)</gadget>
<output>40</output>

<gadget id="calculator">40 / (2/5)</gadget>
<output>100</output>

<result>100</result>