There are 213 small footballs in the school equipment room. There are 4 classes in the first grade, and each class borrows 22. The rest are lent to 5 classes in the second grade, how many are borrowed by each class on average? (solution by equation)
学校器材室一共有213个小足球．一年级4个班，每班借了22个．剩下的借给二年级的5个班，平均每班借多少个？(用方程解)
<gadget id="calculator">22 * 4</gadget>
<output>88</output>

<gadget id="calculator">213 - 88</gadget>
<output>125</output>

<gadget id="calculator">125 / 5</gadget>
<output>25</output>

<result>25</result>