Jiale student reads an extra-curricular book. He originally planned to read 40 pages a day, and he can finish it in 15 days. Because he has to return it in advance, he needs to finish it within 8 days. How many pages should he read at least every day? (Solve with ratio)
家乐同学看一本课外书，原计划每天看40页，15天可以看完，因为要提前归还，需要在8天内看完，现在每天至少要看多少页？(用比例解)
<gadget id="calculator">40 * 15</gadget>
<output>600</output>

<gadget id="calculator">600 / 8</gadget>
<output>75</output>

<result>75</result>