Alright, let's work through 4142 times 9403 step by step
4142 × 9403 = 9403 × (4142)
+ 9403 × 2 resulting in 18806
+ 9403 × 40 that results in 376120
+ 9403 × 100 that results in 940300
+ 9403 × 4000 resulting in 37612000

= 38947226
