Alright, let's work through 6375 times 5680 step by step
6375 × 5680 = 5680 × (6375)
+ 5680 × 5 resulting in 28400
+ 5680 × 70 that results in 397600
+ 5680 × 300 what gives us 1704000
+ 5680 × 6000 what gives us 34080000

= 36210000
