Alright, let's work through 2100 times 1940 step by step
2100 × 1940 = 1940 × (2100)
+ 1940 × 0 yielding 0
+ 1940 × 00 resulting in 0
+ 1940 × 100 giving us 194000
+ 1940 × 2000 what gives us 3880000

= 4074000
