Cut a rectangular paper with a length of 45 cm and a width of 30 cm into a square with the same size and as large an area as possible. If there is no paper left, how many pieces can be cut at least?
把一个长45厘米、宽30厘米的长方形纸裁成同样大小、面积尽可能大的正方形，纸没有剩余，至少可以裁多少个？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">30 / 15</gadget>
<output>2</output>

<gadget id="calculator">45 / 15</gadget>
<output>3</output>

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

<result>6</result>