A cuboid iron water tank has a volume of 60L and a height of 4dm. What is the area of its bottom in dm**2.
一个长方体铁皮水箱，容积是60L，高是4dm，它的底面积是多少dm**2．
<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<result>15</result>