The definition of large numbers in ancient times was not uniform. For example, Cheng Dawei, a mathematician in the Ming Dynasty, said, "Ten trillion is one billion, one billion is one trillion, and ten trillion is Beijing ..." According to this statement, one trillion should be equal to 1 million ("trillion" is consistent with the current idiom), and a Beijing should be equal to 1 million.

Some people also say "100 million" (the term "100 million" is the same as today), trillion is trillion, and 10 trillion is Beijing ... According to this statement, a Beijing should be equal to/kloc-0 1000000000000000.

Others say that 100 million is one trillion, and one trillion is Beijing ... According to this, a Beijing should be equal to10000000000000000000000000.

How much should a Beijing cost? There is no conclusion. As for a "Gurol", it should be the creation of modern people, and not many people know it except the creator.