One day a mother takes her little son to a park. They see a note on the gate of the park. It says, "Children taller than one meter should buy a ticket. Each ticket is six yuan. " The mother and the son walk to the conductor. She gives the conductor six yuan and says, "One ticket, please?" The conductor looks at the the boy carefully and asks, "My boy, how tall are you?" The boy answers, "My mother says I'm 1、2 meters tall at home but 0. 8 meters tall in other places. "