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 €55,093
Divide €55,093 by 52.18 = €1,056
Divide €1,056 by 37.5 = €28.16
Multiply €28.16 by 2 = €56.32