The thermal power plant used 234 tons of coal this month, 120 tons more than last month. How many tons of coal will be used in two months? What is the column
热电厂这个月用煤234吨，比上个月多出120吨，两个月共用煤多少吨？列式为多少
<gadget id="calculator">234 - 120</gadget>
<output>114</output>

<gadget id="calculator">114 + 234</gadget>
<output>348</output>

<result>348</result>