Xiaoli is reading a foreign classic. If she reads 27 pages a day, she can finish reading it in 13 days, but the library loan deadline is 9 days later. In this case, how many pages does Xiaoli have to read every day to finish reading on time? (Solved in two ways)
小丽在读一本外国名著，如果每天读27页，那么13天可以读完，可是图书馆的借书日期在9天后截止，这样的话小丽每天要读几页才能按时读完？(用两种方法解决)
<gadget id="calculator">13 - 9</gadget>
<output>4</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">27 * (4/9)</gadget>
<output>12</output>

<gadget id="calculator">12 + 27</gadget>
<output>39</output>

<result>39</result>