900!/898!
(900)(899)
Jeez... that's gonna be ugly. Welp let's put that into handy dandy notebook calculator.
The result:
l don't know, past infinity obviously. The calculator died trying to solve this one.
\((900 * 899 * 898 ! )\over898!\) Rewrite the problem like this. Notice that the 898! can cancel out.
900*899 = 809100
+1491 
