A giant ship’s engine broke down, it was immobile out at sea and no one on-board could repair it.
Being stranded with the engine not working, was costing the company $100,000 dollars a day.

So they hired an Engineer with over 30 years of experience.

Once on board, he inspected the engine very carefully, from top to bottom.
After seeing everything, the engineer unloaded his bag and pulled out a small hammer.

He knocked something gently. Soon, the engine came to life again. The engine has been fixed!! 😊

A week later the engineer sent an invoice of $100,000 to the ship owner for the total cost of repairing the giant ship.

“What?!!” said the owner.

“You did almost nothing. Give us a detailed bill.”

The answer was simple:

“Tap with a hammer: $2.

Knowing where to knock and how hard to knock: $19,998.

If I do a job in 30 minutes, it’s because I spent 30 years learning how to do that in 30 minutes.
You owe me for the years, not the minutes.”