There are 150 books on the bookshelf in the library. After removing 44 books from the first floor, put 25 books on the second floor. How many books are there on the bookshelf now?
图书室书架上放有150本书，第一层拿走44本后，再在第二层放进25本，现在书架上有多少本书？
<gadget id="calculator">150 - 44</gadget>
<output>106</output>

<gadget id="calculator">106 + 25</gadget>
<output>131</output>

<result>131</result>