Alright, let's work through 2164 times 9181 step by step
2164 × 9181 = 9181 × (2164)
+ 9181 × 4 yielding 36724
+ 9181 × 60 what gives us 550860
+ 9181 × 100 giving us 918100
+ 9181 × 2000 producing 18362000

= 19867684
