A book has 120 pages. I read the whole book (1/3) on the first day, and read (4/5) the pages on the second day. How many pages should I start reading on the third day?
一本书120页，第一天看了全书的(1/3)，第二天看的页数是第一天的(4/5)．第三天从多少页开始看？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/3) * (4/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(1/3) + (4/15)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 * (3/5)</gadget>
<output>72</output>

<gadget id="calculator">72 + 1</gadget>
<output>73</output>

<result>73</result>