After printing 60% of a manuscript, there are still 2,400 words left to be typed. How many words are there in this manuscript?
一份稿件，打印了它的60%后，还有2400字没打完，这份稿件共有多少字？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2_400 / (2/5)</gadget>
<output>6_000</output>

<result>6_000</result>