Decimal.*
*that 
Group: Operators
Aliases: times
Documentation
Multiplies a Decimal by another Decimal or other kind of number.
Arguments to * will undergo automatic conversions such that you need not convert other numeric types to Decimal manually.
Arguments
- that: The number to multiply by this.
Examples
Multiplying 10.22 and 20.33.
      a = Decimal.new "10.22"
      b = Decimal.new "20.33"
      c = a * b
      # => Decimal.new 207.7726