Liming borrowed a story book from the school library, and planned to read 6 pages a day and finish it in 20 days. If the school limits reading within 15 days, how many pages does he need to read every day? (answer with ratio)
黎明在学校图书馆借来一本故事书，计划每天看6页，20天看完．如果学校限定15天看完，他每天需看多少页？(用比例解答)
<gadget id="calculator">20 * 18</gadget>
<output>360</output>

<gadget id="calculator">360 / 15</gadget>
<output>24</output>

<result>24</result>