How to express "more than 3 times than something"?
This is what I think:
(1) 6 is three times as large as 2
(2) 6 is three times larger than 2
(3) 7 is more than 3 times larger than 2

Do I express them in the right way?
Please tell me how to express this meaning in the common way.

Thank you!

Question

How to express "more than 3 times than something"?
This is what I think:
(1) 6 is three times as large as 2
(2) 6 is three times larger than 2
(3) 7 is more than 3 times larger than 2

Do I express them in the right way?
Please tell me how to express this meaning in the common way.

Thank you!

Answer

6 is three times (thrice) bigger than 2
7 is bigger than 3 multiplied by 2.

Answer

If I were you, I would just use "times as large as". The problem with saying an amount "X larger than" is that not everyone will understand it the same way. It's a bit ambiguous whether you are talking about the difference or the whole amount. To see this, consider that 6 is 4 larger than 2, i.e. two times. But people won't always understand it that way, and may consider the expressions to be equivalent. It's best to avoid the potential confusion and not use that way of putting it.

Answer

6 is three times 2 (number)
7 is more than three times 2

China is 10 times larger than France.  (size)

Answer

Yes, your statements are grammatically and mathematically correct.