To bind exercise books of the same size, if each book contains 38 pages, 300 books can be bound. If each book is ordered with 2 more pages, how many books can be bound? (Solve with ratio)
装订同样大小的练习本，如果每本装38页，可装订300本，如果每本多订2页，可以装订多少本？(用比例解)
<gadget id="calculator">300 * 38</gadget>
<output>11_400</output>

<gadget id="calculator">38 + 2</gadget>
<output>40</output>

<gadget id="calculator">11_400 / 40</gadget>
<output>285</output>

<result>285</result>