The engine of a giant ship broke down and no one could fix it, so they hired a mechanical engineer with over 40 years of experience
He examined the engine very carefully, from top to bottom. After checking everything, the engineer opened his bag and took out a small hammer.
He gently tapped something. Soon, the engine was working again.
The engineer then mentioned to the ship owner that the total cost of repairing the giant ship was $20,000.
Ship owner: "What the hell? You barely did anything. Give us a detailed bill."
The engineer replied
Simply: "Knock with a hammer: $2. Know where and how to knock: $19,998.
I do this job in 30 minutes, that's because I spent 20 years learning how to do this job in 30 minutes. The value of the work I provide to the customer is based on those 20 years of experience, not on the last 30 minutes, Sir.
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