Use 3 cubes of equal size to form a cuboid. The surface area of this cuboid is 70 square centimeters. What is the surface area of the original cube?
用3个大小相等的正方体拼成一个长方体，这个长方体的表面积是70平方厘米，原来一个正方体的表面积是多少平方厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">18 - 4</gadget>
<output>14</output>

<gadget id="calculator">70 / 14</gadget>
<output>5</output>

<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<result>30</result>