Cut a piece of rectangular paper with a length of 18 cm and a width of 12 cm into squares of the same size and as large an area as possible. If there is no paper left, how many squares can be cut at least?
把一张长18厘米，宽12厘米的长方形纸片截成同样大小且面积尽可能大的正方形，纸没有剩余，请问至少可以裁多少个正方形？
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>