No problem, we've got 8403 and 5040 to multiply
8403 × 5040 = 5040 × (8403)
+ 5040 × 3 that results in 15120
+ 5040 × 00 that equals 0
+ 5040 × 400 giving us 2016000
+ 5040 × 8000 that is equal 40320000

= 42351120
