Alright, let's work through 7641 times 5237 step by step
7641 × 5237 = 5237 × (7641)
+ 5237 × 1 resulting in 5237
+ 5237 × 40 yielding 209480
+ 5237 × 600 that is equal 3142200
+ 5237 × 7000 producing 36659000

= 40015917
