Divide annual salary by 52.18 = weekly rate
Divide weekly rate by 37.5 = hourly rate
Multiply hourly rate by 2 = Time x 2
For example, if the annual salary is equal to €
Divide €54,013 by 52.18 = €1,035
Divide €1,035 by 37.5 = €27.60
Multiply €27.60 by 2 = €55.20