There is a rectangular paper with a length of 6 cm and a width of 4 cm. At least how many sheets of this paper are needed to form a square.
有一种长方形纸长6厘米，宽4厘米，最少要有多少张这样的纸才能拼成一个正方形．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

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

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

<result>6</result>