Oh dear oh dear.
x*y/2=333.248
/ and * have equal precedence, so we work from left to right, it becomes:
(x*y)/2 = 333.248
therefore:
x*y = 666.496
That's the ONLY definitive thing we can get from that equation. There are an infinite number of values x and y could take to get that thing to work.
x=2, y=333.248
x=1, y=666.496
x=10, y=66.6496
...
I could go on. Hence the bit about there being an infinite set of possible values.
If you disagree, please explain how 666.496*1 doesn't equal 666.496...
You've either not posted the question properly, or it has no definitive answers for x and y other than their product.