Xiaoguang reads a book, 40 pages a day, and can finish reading in 12 days. If it takes 8 days to finish reading, how many pages do he need to read every day? (Solve with ratio)
小光读一本书，每天读40页，12天可以读完，如果要8天读完，每天要读多少页？(用比例解)
<gadget id="calculator">12 * 40</gadget>
<output>480</output>

<gadget id="calculator">480 / 8</gadget>
<output>60</output>

<result>60</result>