There are several identical rectangular pieces of paper, the ratio of length to width is 3:2, at least how many such rectangles are used to form a square.
有若干个完全相同的长方形纸片，长和宽的比是3：2，至少要用多少个这样的长方形才能拼成一个正方形．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

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

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

<result>6</result>