Honghong wants to print a project activity report. She has already finished typing (1/3) of the report. If she typed another 400 words, she would just finish 40% of the report. How many words are there in this activity report?
红红要打印一份项目活动报告，她已经打完了报告的(1/3)，如果再打400字，就正好完成报告的40%，这份活动报告一共多少字？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/5) - (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">400 / (1/15)</gadget>
<output>6_000</output>

<result>6_000</result>