A piece of iron with a length of 6 cm, a width of 4 cm, and a height of 5 cm is melted and cast into a cone with a height of 15 cm. What is the area of the bottom of the cone in cm**2?
把一块长6cm，宽4cm，高5cm的铁块溶铸成一个高是15cm的圆锥，这个圆锥的底面积是多少cm**2？
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">6 * 4 * 5 * (1/5)</gadget>
<output>24</output>

<result>24</result>