After reading 180 pages of a book, I read all of them (2/5) on the first day, and the rest (3/4) on the second day. How many pages can I read on the third day?
一本书180页看完，第一天看了全部的(2/5)，第二天看了剩下的(3/4)，第三天看多少页才能看完？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 * (2/5)</gadget>
<output>72</output>

<gadget id="calculator">180 - 72</gadget>
<output>108</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">108 * (3/4)</gadget>
<output>81</output>

<gadget id="calculator">180 - 72 - 81</gadget>
<output>27</output>

<result>27</result>