Xiaohong and Xiaoming went to the bookstore to buy books with the same amount of money. Xiaohong said: "If I buy books at 3.6 yuan each, I will buy exactly 5 books. Xiaoming said: "If I buy books at 2 yuan each, how many books do you think I can buy? "Please help Xiaohong answer.
小红与小明带着同样多的钱去书店买书．小红说："如果我买每本3.6元的书，正好买5本．小明说："如果我买每本2元的书，你说我可以买多少本？"请你帮小红解答．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.6 * (5/2)</gadget>
<output>9</output>

<result>9</result>