Peking University Huimin Food Factory sold 1,200 pieces of food this year, an increase of 20% compared to last year. How many pieces of food were sold last year?
北大回民食品厂今年卖出食品1200件，今年卖出食品比去年增加20%，问去年卖出多少件食品？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1_200 / (6/5)</gadget>
<output>1_000</output>

<result>1_000</result>