How to give direction to your math teacher 

While in town, I met my high school maths teacher & he asked for the direction to Bank.
Me: Make a 360 turn, walk for about 1.8 metres (Round that up to the nearest tens), 
you will then see a shop which is perpendicularly to your right, make an obtuse angle turn & you will see the bank at a distance of about the logarithm of 7.
Let him feel what I felt as a student during his math class.??