A cuboid iron block with a length of 8 cm, a width of 5 cm, and a height of 2 cm is melted and cast into a cylinder with a height of 5 cm. What is the area of the base of the cylinder?
把一个长8厘米，宽5厘米，高2厘米的长方体铁块熔铸成一个高为5厘米的圆柱，这个圆柱的底面积是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">8 * 5 * (2/5)</gadget>
<output>16</output>

<result>16</result>