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 €56,200
Divide €56,200 by 52.18 = €1,077.04
Divide €1,077.04 by 37.5 = €28.72
Multiply €28.72 by 2 = €57.44