What is the surface area of 3 cubes whose sides are 5 cm long to form a cuboid?
把3个棱长5厘米的正方体，拼成一个长方体，表面积是多少？
<gadget id="calculator">5 * 5 * 6 * 3</gadget>
<output>450</output>

<gadget id="calculator">5 * 5 * 4</gadget>
<output>100</output>

<gadget id="calculator">450 - 100</gadget>
<output>350</output>

<result>350</result>