Alright, let's work through 3631 times 5642 step by step
3631 × 5642 = 5642 × (3631)
+ 5642 × 1 that equals 5642
+ 5642 × 30 which equals 169260
+ 5642 × 600 resulting in 3385200
+ 5642 × 3000 resulting in 16926000

= 20486102
