It is scientific notation of a floating point number. The ‘e’ means exponent, a power of 10. e+6 means 10 to the power 6, that is 1 million. 2.4e+6 is 2.4 million.
What should I do to get the area without this value?
Round or Format number display
Thank you
check your rhino units as well, this is a very large value ± 2400x1000. But your surface is not even extending the rhino grid

