Quel âge as-tu? Et en années de chien?

This is an idea for practising big numbers with students. 

It came from a tweet from my friend, Fiona, this morning.

Fiona asked,

Dear francophones, how do I say “but he is 70 in dog years”? Would I have to explain the whole concept, or would a French person understand?

and I remembered a site I'd seen a while ago after an argument a conversation I'd had with someone about 1 dog year not being equivalent to 7 human years.

The site is kwebbel.net and it is a calculator which tells you your age in dog years or your dog's age in human years. The page can be seen in 9 different languages.

I think this would be a great idea for teaching and practising high numbers with younger students.

By the way, if I were a dog I'd be 189 years old.