123456+234567+345678+456789+567901+679012+790123+901234=how many.
123456+234567+345678+456789+567901+679012+790123+901234=多少．
<gadget id="calculator">123_456 + 234_567 + 345_678 + 456_789 + 567_901 + 679_012 + 790_123 + 901_234</gadget>
<output>4_098_760</output>

<result>4_098_760</result>