A story book has 480 pages. I read (1/4) of the whole book in the first week and (1/3) of the whole book in the second week. How many pages have I read in two weeks?
一本故事书有480页，第一周看了全书的(1/4)，第二周看了全书的(1/3)，两周一共看了几页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/4) + (1/3)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">480 * (7/12)</gadget>
<output>280</output>

<result>280</result>