Alright, let's work through 2843 times 768 step by step
2843 × 768 = 768 × (2843)
+ 768 × 3 what gives us 2304
+ 768 × 40 what gives us 30720
+ 768 × 800 what gives us 614400
+ 768 × 2000 that equals 1536000

= 2183424
