"123456789101112…282930" is a multi-digit number, 40 numbers are crossed out from it, so that the remaining numbers (the sequence cannot be changed) form the largest multi-digit number, what is the largest multi-digit number?
"123456789101112…282930"是一个多位数，从中划去40个数字，使剩下的数字(先后顺序不能变)组成最大的多位数，这个最大的多位数是多少．
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