Alright, let's work through 9159 times 8820 step by step
9159 × 8820 = 8820 × (9159)
+ 8820 × 9 resulting in 79380
+ 8820 × 50 giving us 441000
+ 8820 × 100 that equals 882000
+ 8820 × 9000 producing 79380000

= 80782380
