Alright, let's work through 1380 times 3143 step by step
1380 × 3143 = 3143 × (1380)
+ 3143 × 0 giving us 0
+ 3143 × 80 that results in 251440
+ 3143 × 300 that equals 942900
+ 3143 × 1000 that equals 3143000

= 4337340
