Answer: 1,600 cubic inches
Step-by-step explanation: 20x4=80 multiply both sides 80x20=1,600 cubic inches
5.3851648071..... is the irrational number your looking for
(2, 6) because it is halfway between both endpoints
6 is the highest common factor
I don't think there is a large number because the numbers never end it expands. Interesting question.