When arranging the classroom, a rectangular cardboard with a length of 36 cm and a width of 27 cm should be cut into several square cards of the same size. Square cards?
布置教室时，要将一张长36厘米，宽27厘米的长方形卡纸裁成若干张同样大小的正方形卡片，纸片不能有剩余，且正方形的边长最大，至少可以裁成几张这样的正方形卡片？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">36 / 9</gadget>
<output>4</output>

<gadget id="calculator">27 / 9</gadget>
<output>3</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>