Calculation: 1.9999+19.999+199.99+1999.9+19999=how much.
计算：1.9999+19.999+199.99+1999.9+19999=多少．
<gadget id="calculator">1.9999 + 19.999 + 199.99 + 1_999.9 + 19_999</gadget>
<output>22_220.8889</output>

<result>22_220.8889</result>