Teacher Tsering read a 400-page "King Gesar" storybook. He read (1/4) in the first week and the rest (2/3) in the second week. How many pages did he read in two weeks?
次仁老师看一本400页的《格萨尔王》故事书，第一周看了(1/4)，第二周看了余下的(2/3)，两周一共看了多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/4) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/4) + (1/2)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">400 * (3/4)</gadget>
<output>300</output>

<result>300</result>