Seek the complete version and meaning of the joke "A group of great scientists play hide-and-seek in heaven after their death"

A group of great scientists played hide-and-seek in heaven after their death. It's Einstein's turn to arrest people. He counted to 100 and opened his eyes. He saw everyone hiding, except Newton. Einstein went over and said, "Newton, I got you." Newton: No, you didn't catch Newton. Einstein: You are not Newton. Who are you? Newton: What do you see under my feet? Newton stood on a square floor tile with a length and width of one meter. Newton: This is a square of one square meter under my feet. I stand on it. It is Newton/square meter, so you don't catch Newton, you catch Pascal. "