Wang Li typed a document and typed 3,600 words in 15 minutes, leaving 40% of the full text. How many words are there in the full text?
王丽打一份文件，15分钟打了3600字，还剩全文的40%，全文共有多少个字？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3_600 / (3/5)</gadget>
<output>6_000</output>

<result>6_000</result>