Calculation: 123+234+345+456+567+678+789=how much.
计算：123+234+345+456+567+678+789=多少．
<gadget id="calculator">123 + 234 + 345 + 456 + 567 + 678 + 789</gadget>
<output>3_192</output>

<result>3_192</result>