The area of a rectangle is 75cm**2 and the length is 15cm. At least how many such rectangles can be put together to form a square.
一个长方形的面积是75cm**2，长是15cm，至少多少个这样的长方形可以拼成一个正方形．
<gadget id="calculator">75 / 15</gadget>
<output>5</output>

<gadget id="calculator">1 * 5</gadget>
<output>5</output>

<result>5</result>