| 0 < j, 0 ≤ i0, 0 ≤ i ⊦ (i % j * i0 % j) % j = (i * 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 < j, j0 < j, 0 ≤ i, 0 ≤ i0, 0 ≤ j0 ⊦ (j0 * i0 % j) % j = (i * i0) % j
Used terms: i, j, i1, j0