A cube billet with a side length of 4 decimeters is forged into a cylinder with a height of 8 decimeters. What is the area of the base of this cylinder?
一个棱长4分米的正方体钢坯锻造成一个高是8分米的圆柱，这个圆柱的底面积是多少？
<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * 4 * (1/2)</gadget>
<output>8</output>

<result>8</result>