Introduction
Dr Frog was a great scientist among the frogs. He had made his residence within a well. He was an expert in his field of endeavor and knew everything about the well and related matters. One day, one of his friends came to visit him and said, "My dear friend, I have seen a vast mass of water, the Atlantic Ocean."
"What is that Atlantic Ocean?" asked Dr Frog
"It is very vast" replied the other frog
"How vast is it? Is it five times bigger than this well? Or ten times?” enquired Dr Frog in