What is the cross-sectional area of this pillar?

This cross-sectional diagram shows the internal structure of the building.

The pillars of this building are very sturdy.

Eight gods are enshrined in this shrine.

His policy is based on the three pillars of education, economic, and environmental reform.

Let's see, show me that.

Which one is your bag?

He was made to work like a slave.

How long have you been studying Japanese?

How much Japanese can you speak?