A fertilizer factory produces 2800 tons of fertilizer this year, 40 tons more than last year (1/2). How many tons of fertilizer did you produce last year?
一个化肥厂，今年生产化肥2800吨，比去年的(1/2)多40吨．去年生产化肥多少吨？
<gadget id="calculator">2_800 - 40</gadget>
<output>2_760</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2_760 / (1/2)</gadget>
<output>5_520</output>

<result>5_520</result>