Alright, let's work through 9840 times 497 step by step
9840 × 497 = 497 × (9840)
+ 497 × 0 what gives us 0
+ 497 × 40 resulting in 19880
+ 497 × 800 giving us 397600
+ 497 × 9000 that is equal 4473000

= 4890480
