Calculate how much 9999*1111+3333*6667=.
计算9999*1111+3333*6667=多少．
<gadget id="calculator">9_999 * 1_111</gadget>
<output>11_108_889</output>

<gadget id="calculator">3_333 * 6_667</gadget>
<output>22_221_111</output>

<gadget id="calculator">11_108_889 + 22_221_111</gadget>
<output>33_330_000</output>

<result>33_330_000</result>