Alright, let's work through 5680 times 3709 step by step
5680 × 3709 = 3709 × (5680)
+ 3709 × 0 resulting in 0
+ 3709 × 80 that equals 296720
+ 3709 × 600 what gives us 2225400
+ 3709 × 5000 that results in 18545000

= 21067120
