A certain coal mine produces 1.2 million tons of raw coal per month this year, which is 800,000 tons less than twice the monthly output of last year. How many tons of raw coal was produced per month last year?
某煤矿今年每月生产原煤120万吨，比去年每月产量的2倍少80万吨，去年每月生产原煤多少万吨？
<gadget id="calculator">120 + 80</gadget>
<output>200</output>

<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<result>100</result>