Alright, let's work through 4285 times 7121 step by step
4285 × 7121 = 7121 × (4285)
+ 7121 × 5 what gives us 35605
+ 7121 × 80 giving us 569680
+ 7121 × 200 what gives us 1424200
+ 7121 × 4000 resulting in 28484000

= 30513485
