Simple calculation: 9999*2222+3333*3334.
简便计算：9999*2222+3333*3334．
<gadget id="calculator">9_999 * 2_222</gadget>
<output>22_217_778</output>

<gadget id="calculator">3_333 * 3_334</gadget>
<output>11_112_222</output>

<gadget id="calculator">22_217_778 + 11_112_222</gadget>
<output>33_330_000</output>

<result>33_330_000</result>