Alright, let's work through 8820 times 5815 step by step
8820 × 5815 = 5815 × (8820)
+ 5815 × 0 yielding 0
+ 5815 × 20 resulting in 116300
+ 5815 × 800 that equals 4652000
+ 5815 × 8000 producing 46520000

= 51288300
