For a two-digit number, if the new number obtained after exchanging its two numbers is 75% larger than the original number, such a number is called an AL number. So, what is the average of all AL numbers?
一个二位数，如果将它的两个数字交换后得到的新数比原数大75%，就称这样的数为AL数．那么，所有AL数的平均数是多少？
<gadget id="calculator">12 + 24 + 36 + 48</gadget>
<output>120</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<result>30</result>