The natural number 1234567891011...20012002 is a number with many digits composed of the natural numbers 1-2002 written down in sequence. What is the 2002nd digit starting from the first digit?
自然数1234567891011…20012002是由依次写下的自然数1-2002组成的一个数位很多的数，从首位数字开始的第2002个数字是多少．
<result>7</result>