Xiao Ming enters a manuscript, and there are 2800 words left after entering (2/9). How many words are there in this manuscript?
小明录入一份稿件，录入了(2/9)后还剩2800字，这份稿件共有多少字？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">2_800 / (7/9)</gadget>
<output>3_600</output>

<result>3_600</result>