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