A cuboid is formed by stacking 2100 cubes whose edge length is 1 cm. Its height is 10 cm, and both its length and width are greater than its height. What is the perimeter of its base?
用2100个棱长是1厘米的正方体堆成一个长方体，它的高是10厘米，长和宽都大于高．它的底面周长是多少？
<gadget id="calculator">15 + 14</gadget>
<output>29</output>

<gadget id="calculator">29 * 2</gadget>
<output>58</output>

<result>58</result>