whats mean 72 year=*3 10

To understand the meaning of "72 year=*3 10," we need to break it down:

72 - This is a number.
year - This word indicates a unit of time, specifically a period of 365 or 366 days.
=*3 - This symbol, *=, is not a commonly used mathematical operator. It could be a typo or a symbol from a specific context we are not aware of. Without more information, it is not clear what it represents.
10 - This is another number.

Given the limited information provided, we can only speculate on the meaning of this expression. It is best to clarify the context or provide more details to get a clearer explanation.