Teacher Li brought 800 yuan to the bookstore to buy books and give out prizes. He bought 16 copies of the same book and left 80 yuan. How much is the price of each book?
李老师带了800元钱到书店买书发奖品，买了16本同样的书，还剩80元．每本书的价钱是多少元？
<gadget id="calculator">800 - 80</gadget>
<output>720</output>

<gadget id="calculator">720 / 16</gadget>
<output>45</output>

<result>45</result>