Alright, let's work through 3731 times 5603 step by step
3731 × 5603 = 5603 × (3731)
+ 5603 × 1 that equals 5603
+ 5603 × 30 that results in 168090
+ 5603 × 700 that equals 3922100
+ 5603 × 3000 giving us 16809000

= 20904793
