Simple calculation: 99999*1234-33333*3702.
简便计算：99999*1234-33333*3702．
<gadget id="calculator">99_999 * 1_234</gadget>
<output>123_398_766</output>

<gadget id="calculator">33_333 * 3_702</gadget>
<output>123_398_766</output>

<gadget id="calculator">123_398_766 - 123_398_766</gadget>
<output>0</output>

<result>0</result>