Apparently, I have posted a problem without fully debuging it.
Still, it is challenging. To enable solving it let me state:
1. It involves OPEN*TA
2.The E in OPEN differs(i.e. is represented by another digit) from the E's in ERROR and REAPS.
3. The title suggests the final result of the multiplication.
I hope it is still of interest to decipher it.
Have fun, - Sorry for wasting your time so far.