Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Thomas has been saving $40 in the bank every month for six years. His friend Joseph has been saving 2/5 times less money per month. How much money are they having in their savings account altogether?


### Response:
 Thomas has been saving for six years, and since each year has 12 months, he has been making savings for 6*12 = 72 months.
Since Thomas has been saving $40 in the bank every month for six years, he has saved 72*$40 = $2880
Joseph has been saving 2/5 times less money per month than Thomas, meaning he has been saving 2/5*$40 = $16 less per month.
Joseph's monthly savings is $40-$16 = $24
In six years, Joseph has saved $24*72 = $1728
Together, they have saved a total of $1728+$2880 = $4608