Alright, let's work through 48597310 times 99991636 step by step
48597310 × 99991636 = 99991636 × (48597310)
+ 99991636 × 0 yielding 0
+ 99991636 × 10 that results in 999916360
+ 99991636 × 300 which equals 29997490800
+ 99991636 × 7000 resulting in 699941452000
+ 99991636 × 90000 producing 8999247240000
+ 99991636 × 500000 which equals 49995818000000
+ 99991636 × 8000000 that equals 799933088000000
+ 99991636 × 40000000 that equals 3999665440000000

= 4859324532099160
