Xiao Ming reads a book, reads 18 pages every day, and can finish it in 28 days. If you read 24 pages a day, how many days will it take to finish reading?
小明看一本书，每天看18页，28天可以看完．如果每天看24页，要看多少天看完？
<gadget id="calculator">28 / 24</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">18 * (7/6)</gadget>
<output>21</output>

<result>21</result>