How many cm squares can be made from rectangles with a length of 6 cm and a width of 4 cm?
用长6厘米，宽4厘米的长方形可拼成边长是多少厘米的正方形．
<gadget id="calculator">2 * 3 * 2</gadget>
<output>12</output>

<result>12</result>