7.8
2.5641
39.6
7.8
If x ≡ 39 mod 357 then: x = 357k + 39 for some integer k. Now 357 = 21×17, and 39 = 2×17+5 → x = 21×17×k + 2×17 + 5 → x = 17(21k + 2) + 5 → x = 17m + 5 where m = 21k + 2 (is an integer) → x ≡ 5 mod 17 → the remainder when the number is divided by 17 is 5.
7.8
7.8
It is 39/5, of course!
7.8
2.5641
5.5714
7.8
7.8
39.6
8.7692
7.8
7.8