Cut a piece of rectangular paper with a length of 20 cm and a width of 12 cm into a square with the same size and as large an area as possible. If there is no paper left, at least how many pieces can be cut.
把一张长20厘米，宽12厘米的长方形纸裁成同样大小，且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">5 * 3</gadget>
<output>15</output>

<result>15</result>