Alright, let's work through 3891 times 7507 step by step
3891 × 7507 = 7507 × (3891)
+ 7507 × 1 that results in 7507
+ 7507 × 90 that equals 675630
+ 7507 × 800 giving us 6005600
+ 7507 × 3000 resulting in 22521000

= 29209737
