Calculate with a simple method: 3.79-1.225-(3.775-6.21)
用简便方法计算：3.79-1.225-(3.775-6.21)
<gadget id="calculator">3.775 - 6.21</gadget>
<output>-2.435</output>

<gadget id="calculator">3.79 - 1.225 - (-2.435)</gadget>
<output>5</output>

<result>5</result>