Alright, let's work through 1975 times 6645 step by step
1975 × 6645 = 6645 × (1975)
+ 6645 × 5 producing 33225
+ 6645 × 70 that is equal 465150
+ 6645 × 900 that equals 5980500
+ 6645 × 1000 that results in 6645000

= 13123875
