A book with 120 pages, read (1/3) on the first day, (1/4) on the second day, and which page should you read on the third day?
一本书120页，第一天看(1/3)，第二天看(1/4)，第三天从第几页看起？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">120 * (7/12)</gadget>
<output>70</output>

<gadget id="calculator">70 + 1</gadget>
<output>71</output>

<result>71</result>