Calculate with a simple method: 1999+199.9+19.99+1.999+1.111.
用简便方法计算：1999+199.9+19.99+1.999+1.111．
<gadget id="calculator">1_999 + 199.9 + 19.99 + 1.999 + 1.111</gadget>
<output>2_222</output>

<result>2_222</result>