Alright, let's work through 1780 times 3211 step by step
1780 × 3211 = 3211 × (1780)
+ 3211 × 0 which equals 0
+ 3211 × 80 what gives us 256880
+ 3211 × 700 giving us 2247700
+ 3211 × 1000 that equals 3211000

= 5715580
