Lets see,

Well actually if you take the formula,

5i + 7i = i * (5 + 7) = 12i
4i - 3i = i * (4 - 3) = i
4i * 2i = -8
6i / 2i = 3
1 / i = -i


Assuming they don't release any new chapters,

and then use Pi as a variance to the equation, I think there are actually 14.25 months of non broken, non fillered and well paced naruto left. But I forgot my calculator in my other pocket protector so if you could check my math that would be great.