| i0 % j = 0, 0 < j, 0 ≤ i0, 0 ≤ i ⊦ (i + i0) / j = i / j + i0 / j |
⊦ 0 < j ∧ 0 ≤ i → (i0 = i / j ∧ j0 = i % j ↔ i = i0 * j + j0 ∧ 0 ≤ j0 ∧ j0 < j)
i = i1 * j + j0 ∧ 0 ≤ j0 ∧ j0 < j, i0 % j = 0, 0 < j, 0 ≤ i0, 0 ≤ i ⊦ (i + i0) / j = i1 + i0 / j
Used terms: i, j, i1, j0