In math class, I calculated the square of 5.

I visited Nijo Castle.

How much does this value become when squared?

He used to be the village's magistrate.

Chrysophyta are living in this pond.

Chrysophyta perform photosynthesis underwater, supplying oxygen.

My room is on the second floor, and your room is above mine.

Tanaka-san, have you finished the report?

Mr. Ue is my best friend.

I had a picnic at Ueno Park.