Calculation: 2.84+5.6-2.84+4.4.
计算：2.84+5.6-2.84+4.4．
<gadget id="calculator">5.6 - 2.84</gadget>
<output>2.76</output>

<gadget id="calculator">2.84 + 2.76 + 4.4</gadget>
<output>10</output>

<result>10</result>