The number of Xiaohong's extracurricular books is Xiaoming's (4/5), if Xiaoming gives Xiaohong 4 books, then both of them have the same number. How many books does Xiaohong have?
小红课外书的册数是小明的(4/5)，如果小明给小红4本，那么两人的数同样多．小红原有多少本书？
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 / (1/5)</gadget>
<output>40</output>

<gadget id="calculator">40 * (4/5)</gadget>
<output>32</output>

<result>32</result>