story book has 180 pages in total. Xiaohong read (1/5) of the book on the first day and (1/3) of the book on the second day. How many pages are left?
一本故事书共180页，小红第一天读了这本书的(1/5)，第二天读了这本书的(1/3)，还剩多少页没读？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) + (1/3)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">1 - (8/15)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">180 * (7/15)</gadget>
<output>84</output>

<result>84</result>