The Associative Laws say that it doesn't matter how we group the numbers (i.e. which we calculate first) ... ... when we add : (a + b) + c = a + (b + c). ... or when we multiply : (a Ã b) Ã c = a Ã (b Ã c).
To complete the PCT in two months (or less) you will need to average approximately 43.6 mi / 70.2 km per day (this was my longest day on trail).
So if you filed in the U.S. on November 3, 2011 and filed a PCT application on or before November 3, 2012, you would have to make your national stage decisions within 30 months from the initial U.S. filing, or on or before May 3, 2014.