Look! Here it is people. From snopes.com. Read carefully and live the rest of your life free from ignorance.
You don't figure out dog years by multiplying the dog's age by seven
And I already knew this, because sometimes dogs live to, like 20, which would mean they were "really" 140. And since no human lives to be 140, and the whole "dog years" formula is supposed to give us a point of comparison between human and dog ages, that would be...
Thank God for Snopes.