0-9, make up two four digit, subtract and multiply by a two digit, equal to 900, each number can not be repeated

0-9, make up two four digit, subtract and multiply by a two digit, equal to 900, each number can not be repeated

answer:
6048-5973=75
75*12=900
5012-4987=25
25*36=900
Methods: first decompose the quality factor 900 = 2 * 2 * 3 * 3 * 5 * 5
Because the last digit of two four digit numbers can not be the same (because each digit can not be repeated), and the number subtracted is multiplied by a two digit number, which is equal to 900, so the number subtracted should be greater than 10 and less than 90 (if the number subtracted is 9, 9 * 99 = 891)