What is the cross-sectional area of this pillar?

In math class, we learned about finding the area of a circle.

He used the radius to find the area of the circle.

He is studying late into the night to learn a new computer language.

This computer is using the latest technology.

I analyze data using a spreadsheet software.

Computational linguistics is the study of analyzing human language with computers.

The mythology of Oyamatsumi is particularly interesting among Japanese myths.

The space complexity of this algorithm is O(n).

The time complexity of this algorithm is O(n).