40%+2.8*40%+6.2*40%; ((3/4)-(1/2))*200%
40%+2.8*40%+6.2*40%；((3/4)-(1/2))*200%
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.8 * (2/5)</gadget>
<output>1.12</output>

<gadget id="calculator">6.2 * (2/5)</gadget>
<output>2.48</output>

<gadget id="calculator">(2/5) + 1.12 + 2.48</gadget>
<output>4</output>

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

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>