The two typed a manuscript together, Xiao Ming typed 45 characters per minute, and Xiao Dong typed 55 characters per minute. The two of them just finished typing after 8 minutes of typing together. How many words are there in this manuscript?
两人合打一份书稿，小明每分钟打45个字，小东每分钟打55个字．他们两人合打8分钟后刚好打完，这份书稿有多少字？
<gadget id="calculator">45 + 55</gadget>
<output>100</output>

<gadget id="calculator">100 * 8</gadget>
<output>800</output>

<result>800</result>