How many circles with a radius of 1.5 cm can be drawn in a rectangle with a length of 10 cm and a width of 8 cm.
在一个长10厘米，宽8厘米的长方形里，可以画多少个半径为1.5厘米的圆．
<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

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

<result>6</result>