No problem, we've got 4645 and 8580 to multiply
4645 × 8580 = 8580 × (4645)
+ 8580 × 5 that results in 42900
+ 8580 × 40 that is equal 343200
+ 8580 × 600 that is equal 5148000
+ 8580 × 4000 that equals 34320000

= 39854100
