norm_num
case right.succ.intro.intro.intro.intro.intro.intro.intro.right.right
a b✝ c : ℤθ
b : ℕ
c1 c2 c3 : ℤ
⊢ (2139 + c1 * 6417 + (c3 * 1047 - c2 * 2592)) % 3 = 0
case right.succ.intro.intro.intro.intro.intro.intro.intro.right.right
a b✝ c : ℤθ
b : ℕ
c1 c2 c3 : ℤ
⊢ 3 ∣ 2139 + c1 * 6417 + (c3 * 1047 - c2 * 2592)