There are 30 books in the book corner. They were lent out (1/5) on the first day, and 5 books were returned on the second day. How many books are there in the book corner now?
图书角有书30本，第一天借出了(1/5)，第二天又还回5本，现在图书角有多少本书？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">30 * (4/5)</gadget>
<output>24</output>

<gadget id="calculator">24 + 5</gadget>
<output>29</output>

<result>29</result>