We're going to solve 1591 multiplied by 8380
1591 × 8380 = 8380 × (1591)
+ 8380 × 1 that is equal 8380
+ 8380 × 90 resulting in 754200
+ 8380 × 500 giving us 4190000
+ 8380 × 1000 yielding 8380000

= 13332580
