Remove two numbers from the divisor and the dividend of the formula 1998/8991 to make the result of the new formula as small as possible, then what is the number at the 1998th place after the decimal point of the result.
从算式1998/8991的除数和被除数中各去掉两个数字，使得新算式的结果尽可能的小，那么该结果小数点后第1998位上的数字是多少．
<result>8</result>