Alright, let's work through 4235 times 4204 step by step
4235 × 4204 = 4204 × (4235)
+ 4204 × 5 what gives us 21020
+ 4204 × 30 which equals 126120
+ 4204 × 200 resulting in 840800
+ 4204 × 4000 producing 16816000

= 17803940
