There was a brilliant French mathematician named Gloin. He went to spend the night with his old friend Rupert. Unexpectedly, the doorman told him that Rupert had been killed two weeks ago and his property had been looted.
The disappointed mathematician didn't leave at once. He wants to catch the murderer and avenge his old friend. He found Rupert still holding a piece of pie in his hand and thought it was a clue. His brain was spinning fast, and he suddenly grabbed the female doorman and ran to room' 14 on the third floor. The mathematician asked: Who lives here? The woman at the door said that it was misar. What about this guy? I like drinking and gambling, but I moved out two days ago. The doorman replied.
This misar is a murderer! Mathematicians say for sure.
The doorwoman said in surprise, what is your basis?
The mathematician said: Rupert is an excellent thinker. Pie is called' Pie' in English, while Pie is π in Greek, which means pi. People generally take the value as 3. 14, which is misar's room number, so misar is the murderer! After investigation, the police and mathematicians caught the murderer and got revenge.