How much is the price of this product?

This building has a four-step staircase.

I climbed up the five-step staircase.

He is a Go player with a dan rank.

His acting has gone up a stage and grade.

He injured his foot.

His eyes are very sharp.

He said he wanted to travel to the seven continents.

My dream is to travel the seven seas.

Mom, my leg hurts.