| dec_j = mkDecimal(i3, i4) ⊦ mkDecimal(i, i0) * (mkDecimal(i1, i2) + dec_j) = mkDecimal(i, i0) * mkDecimal(i1, i2) + mkDecimal(i, i0) * dec_j |
⊦ mkDecimal(i, i0) * (mkDecimal(i1, i2) + mkDecimal(i3, i4)) = mkDecimal(i, i0) * mkDecimal(i1, i2) + mkDecimal(i, i0) * mkDecimal(i3, i4)