Hello from MrBillDoesMath!
Answer:
7554m (approximately)
Discussion:
One of the many formulas for the area of a triangle is:
1/2 (product of length of base legs) * (sine of the included angle)
In our case this is
(1/2) (104) ( 226) sin (40) =
(1/2) (104) ( 226)( 0.643) = 7554m
Regards,
MrB