Alright, let's work through 8490 times 5263 step by step
8490 × 5263 = 5263 × (8490)
+ 5263 × 0 resulting in 0
+ 5263 × 90 resulting in 473670
+ 5263 × 400 what gives us 2105200
+ 5263 × 8000 resulting in 42104000

= 44682870
