Calculation: 84/((28.02+11.98)*(62.8-62.3)).
计算：84/((28.02+11.98)*(62.8-62.3))．
<gadget id="calculator">28.02 + 11.98</gadget>
<output>40</output>

<gadget id="calculator">62.8 - 62.3</gadget>
<output>0.5</output>

<gadget id="calculator">40 * 0.5</gadget>
<output>20</output>

<gadget id="calculator">84 / 20</gadget>
<output>21/5 = around 4.2</output>

<result>21/5 = around 4.2</result>