Calculation: 111111*999999+999999*777777=how much.
计算：111111*999999+999999*777777=多少．
<gadget id="calculator">111_111 * 999_999</gadget>
<output>111_110_888_889</output>

<gadget id="calculator">999_999 * 777_777</gadget>
<output>777_776_222_223</output>

<gadget id="calculator">111_110_888_889 + 777_776_222_223</gadget>
<output>888_887_111_112</output>

<result>888_887_111_112</result>