Cut a piece of rectangular paper with a length of 20 cm and a width of 15 cm into squares with the same size and as large an area as possible, and there is no paper left. How many pieces can be cut at most?
把一张长20cm、宽15cm的长方形纸裁成大小一样，面积尽可能大的正方形，且纸没有剩余，至多可以裁多少个？
<gadget id="calculator">20 * 15</gadget>
<output>300</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">300 / 25</gadget>
<output>12</output>

<result>12</result>