Divide a cuboid with a length of 20 cm, a width of 10 cm, and a height of 5 cm into several small cubes of the same size, and then assemble these small cubes into a large cube. What is the surface area of the large cube in cm**2.
把一个长20cm，宽10cm，高5cm的长方体分割成若干个同样大小的小正方体，再把这些小正方体拼成一个大的正方体，这个大正方体的表面积是多少cm**2．
<gadget id="calculator">5 * 2 * 5 * 2 * 6</gadget>
<output>600</output>

<result>600</result>