A square is made of several rectangular pieces of paper with a length of 8 cm and a width of 6 cm. What is the minimum number of such pieces of paper needed?
用若干张长8厘米，宽6厘米的长方形纸片拼成一个正方形，最少需要多少张这样的纸片．
<gadget id="calculator">24 / 8</gadget>
<output>3</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

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

<result>12</result>