Xiao Ming can type about 504 words in 6 minutes. Now this article takes 18 minutes. How many words are there in this article?
小明6分钟大约可以打504个字，现在这篇文章用了18分钟，这篇文章大约有多少个字？
<gadget id="calculator">504 / 6</gadget>
<output>84</output>

<gadget id="calculator">84 * 18</gadget>
<output>1_512</output>

<result>1_512</result>