Cut a rectangle with a length of 30 cm and a width of 18 cm into a square with the same size and an area as large as possible. If there is no paper left, at least how many can be cut?
将一个长30厘米，宽18厘米的长方形裁成同样大小，面积尽可能大的正方形，纸没有剩余，至少可以裁几个？
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">30 / 6</gadget>
<output>5</output>

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

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>