This problem falls into the category of mathematics.

This brass vase is very beautiful.

He doesn't take my opinion into consideration at all.

Winter swimming in the dead of winter is a harsh sport that tests physical and mental strength.

Rikuchū is a former place name in Japan, referring to a part of present-day Iwate Prefecture.

I found an insect in the park.

I always eat lunch in the park during the daytime.

He cast copper to make a bell.

He jumped as if he was dancing in mid-air.

Mail arrived while I was away from home.