Simple calculation: 333*333+999*999.
简算：333*333+999*999．
<gadget id="calculator">333 * 333</gadget>
<output>110_889</output>

<gadget id="calculator">999 * 999</gadget>
<output>998_001</output>

<gadget id="calculator">110_889 + 998_001</gadget>
<output>1_108_890</output>

<result>1_108_890</result>