Decimal.Decimal.mul: def of bend-kit-bignum@0.1.0.0
Import: import bend-kit-bignum@0.1.0.0/decimal.bend as Decimal
Lines 49-52 of bend-kit-bignum@0.1.0.0/decimal.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-bignum@0.1.0.0/decimal.bend&start_line=49&end_line=52

import Base
import bend-kit-bignum@0.1.0.0/bigint.bend as Big

def Decimal.mul(a: Decimal, b: Decimal) -> Decimal:
  match a b:
    case Decimal{ua, sa} Decimal{ub, sb}:
      Decimal{Big.BigInt.mul(ua, ub), Nat.add(sa, sb)}

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/bigint.bend&name=BigInt.mul
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bignum@0.1.0.0/decimal.bend&name=Decimal