⊦ ¬ j < 0 → abs(j) = j
i * j = i * j0 + j1, i < 0, abs(j1) < abs(i) ⊦ j1 = 0
i * j = i * j0 + j1, abs(j1) < i ⊦ j1 = 0, i < 0
Used terms: i