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 €55,644
Divide €55,644 by 52.18 = €1,066.39
Divide €1,066.39 by 37.5 = €28.44
Multiply €28.44 by 2 = €56.88