A cuboid lead block with a length of 10 cm, a width of 6 cm and a height of 5 cm is melted and cast into a conical plumb bob with a base area of 75 cm2. What is the height of the plumb bob in centimeters? (solution by equation)
将一个长10cm，宽6cm，高5cm的长方体铅块熔铸成一个底面积是75平方厘米的圆锥体铅锤，铅锤的高是多少厘米？(用方程解)
<gadget id="calculator">10 * 6 * 5</gadget>
<output>300</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 75</gadget>
<output>25</output>

<gadget id="calculator">300 / 25</gadget>
<output>12</output>

<result>12</result>