There is a rectangle with a length of 75 cm and a width of 50 cm. At least how many such rectangles can be used to form a square.
有一个长方形，长75厘米，宽50厘米，至少用这样的长方形多少个才能拼成一个正方形．
<gadget id="calculator">150 / 75</gadget>
<output>2</output>

<gadget id="calculator">150 / 50</gadget>
<output>3</output>

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

<result>6</result>