Aunt Wang bought a total of 48 small balls and gave 15 to the kindergarten. The rest were distributed to the three classes of the third grade on average. How many balls can each class get?
王阿姨一共买了48个小皮球，送给幼儿园15个，剩下的平均分给三年级3个班，每班可分得多少个？
<gadget id="calculator">48 - 15</gadget>
<output>33</output>

<gadget id="calculator">33 / 3</gadget>
<output>11</output>

<result>11</result>