No problem, we've got 4005 and 5615 to multiply
4005 × 5615 = 5615 × (4005)
+ 5615 × 5 that is equal 28075
+ 5615 × 00 that results in 0
+ 5615 × 000 that equals 0
+ 5615 × 4000 what gives us 22460000

= 22488075
