I read a few articles and posts about putting some money aside for retirement, but it was mostly for America/Canada where if I understand it right, you have to actively save your money in 401K/RRSP.
In France I am automatically deducted from my paycheck a certain amount by the government, and after working 42years I will touch a pension, which will be calculated as a percentage of my earnings during my career.
Also, if my readings are correct, if I put aside 25 times my annual spending, I should be able to retrieve 4% of the interest annually and be safe with my money. [link]
My question is how can I evaluate the value of the government pension? Say the pension is 25K€ per year, can I consider it to be equal to having 625K€ put aside, earning interests or does the math is different?