2,100 cubes with a side length of 1 meter are stacked into a solid cuboid. Its height is 10 meters, and its length and width are greater than its height. What is the sum of the length and width of the cuboid in meters?
边长1米的正方体2100个，堆成一个实心的长方体，它的高是10米，长、宽都大于高，那么长方体的长与宽的和是多少米．
<gadget id="calculator">14 + 15</gadget>
<output>29</output>

<result>29</result>