rectangular paper plate with a length of 56 cm and a width of 42 cm can be cut into a maximum number of circular paper plates with a radius of 7 cm.
一张长56厘米，宽42厘米的长方形纸版，最多能剪成半径是7厘米的圆形纸版多少个．
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">56 / 14</gadget>
<output>4</output>

<gadget id="calculator">42 / 14</gadget>
<output>3</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>