Lanlan has 36 books, and Lanlan's books are 4 times less than Xiaohua's. How many books does Xiaohua have?
兰兰有36本图书，兰兰的图书比小华的2倍少4本．小华有多少本图书？
<gadget id="calculator">36 + 4</gadget>
<output>40</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<result>20</result>