A rectangular piece of paper with a length of 60 cm and a width of 20 cm can be cut into how many circles with a radius of 10 cm at most.
一张长60厘米，宽20厘米的长方形纸片，最多能裁成多少个半径是10厘米的圆片．
<gadget id="calculator">60 / 20</gadget>
<output>3</output>

<gadget id="calculator">20 / 20</gadget>
<output>1</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<result>3</result>