The surface area of a cuboid is 420 square centimeters. This cuboid can be cut into 3 small cubes. What is the surface area of each small cube?
一个长方体的表面积是420平方厘米，这个长方体正好可以截成3个小正方体，则每个小正方体的表面积是多少平方厘米．
<gadget id="calculator">6 * 30</gadget>
<output>180</output>

<result>180</result>