Xiao Wang and Xiao Zhang are playing a jigsaw puzzle game. They each use several equilateral triangles with a side length of 1 to form an equilateral triangle as large as possible. Xiao Wang has 1000 equilateral triangles with a side length of 1, but no matter what Work hard, the side lengths of the large equilateral triangles formed by Xiao Wang are all smaller than those of the equilateral triangles formed by Xiao Zhang, so how many equilateral triangles with a side length of 1 are at least used by Xiao Zhang.
小王和小张玩拼图游戏，他们各用若干个边长为1的等边三角形拼成一个尽可能大的等边三角形，小王有1000个边长为1的等边三角形，但是无论怎样努力，小王拼成的大等边三角形的边长都比小张拼的等边三角形的边长小，那么，小张用的边长为1的等边三角形至少有多少个．
<gadget id="calculator">32 ** 2</gadget>
<output>1_024</output>

<result>1_024</result>