When Mr. Wang typed a manuscript, the ratio of the number of words typed for the first time to the total number of words was 1:4. If he typed another 200 words, half of the total task could be completed. How many words are there in this manuscript?
王老师打一份稿件，第一次打的个数与总字数的比是1：4，如果再打200个字，就可以完成总任务的一半．这份稿件一共有多少个字？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">200 / (1/4)</gadget>
<output>800</output>

<result>800</result>