If the mean of 10 numbers is 58 if one number is 40. what is the mean of the other 9 numbers?

Mean of 10 numbers is 58 so sum of 10 numbers is 580.

One of them is 40 so the sum of the remaining nine is 540.

So mean of the remaining nine is (their sum)/9 = 540/9 = 60

don't know if I'm understanding right but isn't it roughly 3.60