code: function(factor) {
          return new $.Rect(
              this.x * factor,
              this.y * factor,
              this.width * factor,
              this.height * factor,
              this.degrees);
      }
docs: Multiply all dimensions (except degrees) in this Rect by a factor and
  return a new Rect.
  @function
  @param {Number} factor The factor to multiply vector components.
  @returns {OpenSeadragon.Rect} A new rect representing the multiplication
  of the vector components by the factor