Teacher Chen used a piece of square blow-molded paper to make a small square school tool, and found that it could be cut into several small squares with a side length of 9cm, or several small squares with a side length of 12cm, and there was nothing left. What is the minimum side length of this square blown paper?
陈老师用一张正方形的吹塑纸做小正方形学具，发现既可以剪成几个边长为9cm的小正方形，也可以剪成几个边长为12cm的小正方形，都没有剩余．这张正方形吹塑纸的边长至少是多少厘米？
<gadget id="calculator">2 * 2 * 3 * 3</gadget>
<output>36</output>

<result>36</result>