I had a problem in a program where the result of product is not what it's supposed to be. For example: 775*775 gives 10801 instead of 6006025.
To try to isolate and resolve the problem, I made a simple sketch to test the result of different products. What I found is that if I do the same product in this way: 775/100.00*775/100.00 then multiply the result by 10000 I get the right value: 600625.00
The attached pictures illustrate what I said.
While I can use this solution in my initial program by I still want to do the multiplication directly as more operations means more time.