Alright, let's work through 4248 times 290 step by step
4248 × 290 = 290 × (4248)
+ 290 × 8 that results in 2320
+ 290 × 40 producing 11600
+ 290 × 200 giving us 58000
+ 290 × 4000 which equals 1160000

= 1231920
