Simple calculation: (2.524+1.389)-(0.524+1.389)
简便计算：(2.524+1.389)-(0.524+1.389)
<gadget id="calculator">2.524 + 1.389</gadget>
<output>3.913</output>

<gadget id="calculator">0.524 + 1.389</gadget>
<output>1.913</output>

<gadget id="calculator">3.913 - 1.913</gadget>
<output>2</output>

<result>2</result>