A parallelogram has an area of 4.2cm**2, a height of 1.4cm, and the length of the base in cm.
一个平行四边形，面积4.2cm**2，高1.4cm，底边长多少cm．
<gadget id="calculator">4.2 / 1.4</gadget>
<output>3</output>

<result>3</result>