We're going to solve 6438 multiplied by 9840
6438 × 9840 = 9840 × (6438)
+ 9840 × 8 that is equal 78720
+ 9840 × 30 resulting in 295200
+ 9840 × 400 what gives us 3936000
+ 9840 × 6000 giving us 59040000

= 63349920
