Xinhua Bookstore shipped in a batch of story books, sold 1/4 of the total on the first day, 450 on the second day, and 1/3 of the sum of the previous two days on the third day, leaving 200 books left , How many story books did Xinhua Bookstore bring in?
新华书店运进一批故事书，第一天卖出总数的(1/4)，第二天卖出450本，第三天卖出前两天总和的(1/3)，还剩200本，新华书店运进多少本故事书？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">450 * (1/3)</gadget>
<output>150</output>

<gadget id="calculator">450 + 150 + 200</gadget>
<output>800</output>

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

<gadget id="calculator">(1/4) * (1/3)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (1/4) - (1/12)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">800 / (2/3)</gadget>
<output>1_200</output>

<result>1_200</result>