Alright, let's work through 4640 times 6840 step by step
4640 × 6840 = 6840 × (4640)
+ 6840 × 0 that is equal 0
+ 6840 × 40 that results in 273600
+ 6840 × 600 yielding 4104000
+ 6840 × 4000 which equals 27360000

= 31737600
