Alright, let's work through 1266 times 5639 step by step
1266 × 5639 = 5639 × (1266)
+ 5639 × 6 that is equal 33834
+ 5639 × 60 giving us 338340
+ 5639 × 200 that equals 1127800
+ 5639 × 1000 that is equal 5639000

= 7138974
