He solved a large number of problems.

In the traditional Japanese number system, Muryo-taisu represents a very large number.

Understanding numbers is important for solving math problems.

He was bedridden with illness for several days.

I can't solve this problem because there are too many numbers.

He is learning Japanese in a systematic way.

Traditional Japanese food is healthy and delicious.

Natural numbers start from 0 and continue as 1, 2, 3, 4, 5, 6, 7, 8, 9.

The Reynolds number is an important concept in fluid dynamics.

The dual number does not exist in English grammar.