Alright, let's work through 1811 times 7820 step by step
1811 × 7820 = 7820 × (1811)
+ 7820 × 1 resulting in 7820
+ 7820 × 10 what gives us 78200
+ 7820 × 800 resulting in 6256000
+ 7820 × 1000 resulting in 7820000

= 14162020
