code: func (f *Fpdf) PointConvert(pt float64) (u float64) {
  	return pt / f.k
  }
docs: // PointConvert returns the value of pt, expressed in points (1/72 inch), as a
  // value expressed in the unit of measure specified in New(). Since font
  // management in Fpdf uses points, this method can help with line height
  // calculations and other methods that require user units.