He untied his shoelaces.

It took him a long time to solve the math problem.

I will work using this laptop.

What are you doing, Kinji?

This math problem can be solved using approximation.

Kinji always brightens up the surroundings with his smile.

His painting closely resembles Picasso's work.

He is keeping the gold bullion in a safe place.

Picking flowers is prohibited in this park.

Kinjiro is my best friend.