The two of us borrowed a total of 9 books, and the rental fee for each book is 1.5 yuan. How much does each person pay on average?
我们俩一共借了9本，每本租借费是1.5元，平均每人要付多少钱？
<gadget id="calculator">1.5 / 2</gadget>
<output>0.75</output>

<gadget id="calculator">9 * 0.75</gadget>
<output>6.75</output>

<result>6.75</result>