At the "June 1st Celebration Party", the students dressed up the classroom and hung lanterns around the classroom. Eight lanterns were hung on each side. How many lanterns should be prepared at least.
在"庆六一联欢会"上同学们装扮教室，在教室四周挂灯笼，每边挂8盏灯笼，最少要准备多少盏灯笼．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">32 - 4</gadget>
<output>28</output>

<result>28</result>