Alright, let's work through 6740 times 8305 step by step
6740 × 8305 = 8305 × (6740)
+ 8305 × 0 what gives us 0
+ 8305 × 40 that results in 332200
+ 8305 × 700 that is equal 5813500
+ 8305 × 6000 yielding 49830000

= 55975700
