Calculate how much 999.9*999.9+99.99=.
计算999.9*999.9+99.99=多少．
<gadget id="calculator">999.9 * 999.9</gadget>
<output>999_800.01</output>

<gadget id="calculator">999_800.01 + 99.99</gadget>
<output>999_900</output>

<result>999_900</result>