A park had 2.8 million visitors in the first half of last year, which was 1/6 more than in the second half of the year. How many million visitors did the park have last year?
某公园去年上半年有280万名游客，比下半年多(1/6)．该公园去年有多少万名游客？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">280 / (7/6)</gadget>
<output>240</output>

<gadget id="calculator">240 + 280</gadget>
<output>520</output>

<result>520</result>