He solved a large number of problems.

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 enjoying the game using a pikohan.

This bacterium is about 1 micrometre in size.

What is the molecular formula of this compound?

This room is 20 square meters.

Intermolecular forces are an important factor in determining the properties of a substance.

Molecular biology is a field of study that understands life phenomena at the molecular level.