Xiao Gang has a piece of rectangular paper with a length of 12 cm and a width of 3 cm. If he wants to cut it into circular pieces of paper with a radius of 1.5 cm (it cannot be cut and put together), how many pieces can he cut at most?
小刚有一张长12厘米，宽3厘米的长方形纸，要剪成半径是1.5cm的圆形纸片(不能剪拼)，最多可以剪多少个．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<result>4</result>