We're going to solve 1678 multiplied by 1580
1678 × 1580 = 1580 × (1678)
+ 1580 × 8 yielding 12640
+ 1580 × 70 that results in 110600
+ 1580 × 600 that is equal 948000
+ 1580 × 1000 producing 1580000

= 2651240
