A book has 144 pages, Xiaoya read it for 4 days, and there are 36 pages left. How many pages does she read on average per day?
一本书有144页，小亚看了4天，还剩36页没看．她平均每天看多少页？
<gadget id="calculator">144 - 36</gadget>
<output>108</output>

<gadget id="calculator">108 / 4</gadget>
<output>27</output>

<result>27</result>