Dr. Long published an article on Weibo. After finishing half of the typing, he took a break. He played for 70 minutes in total. It is known that after the break, he typed 26 more words per minute than before the break, and the first 35 minutes than the last 35 minutes. Type 780 characters less. How many words are there in this article?
龙博士在微博发表一篇文章，打完一半后休息了一会，前后共打了70分钟，已知休息后每分钟比休息前每分钟多打26个字，前35分钟比后35分钟少打780个字．这篇文章一共多少个字？
<gadget id="calculator">780 / 26</gadget>
<output>30</output>

<gadget id="calculator">70 - 30</gadget>
<output>40</output>

<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<gadget id="calculator">780 / 10</gadget>
<output>78</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 / (1/2)</gadget>
<output>80</output>

<gadget id="calculator">78 * 80</gadget>
<output>6_240</output>

<result>6_240</result>