Xiao Ming reads a book, if he reads 18 pages a day, he can finish it in 15 days. If you read this book in 10 days, how many pages will you read per day on average?
小明看一本书，如果每天看18页，15天看完．如果10天看完这本书，平均每天要看多少页？
<gadget id="calculator">15 / 10</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">18 * (3/2)</gadget>
<output>27</output>

<result>27</result>