Alright, let's work through 3580 times 1230 step by step
3580 × 1230 = 1230 × (3580)
+ 1230 × 0 giving us 0
+ 1230 × 80 that is equal 98400
+ 1230 × 500 resulting in 615000
+ 1230 × 3000 producing 3690000

= 4403400
