When an integer is multiplied by 13, the last three digits of the product are 123. What is the minimum number of such an integer?

When an integer is multiplied by 13, the last three digits of the product are 123. What is the minimum number of such an integer?

Integer is the smallest, we can know that the product is also the smallest; so the product is at least four digits, from the thousand is 1, we can know from the discussion: 123 △ 13 ≈ 9.46 is a decimal; 1123 △ 13 ≈ 86.38 is a decimal; 2123 △ 13 ≈ 163.31 is a decimal; 3123 △ 13 ≈ 240.23 is a decimal; 4123 △ 13 ≈ 317.15 is a decimal