No problem, we've got 20130405 and 28789664 to multiply
20130405 × 28789664 = 28789664 × (20130405)
+ 28789664 × 5 that equals 143948320
+ 28789664 × 00 resulting in 0
+ 28789664 × 400 that is equal 11515865600
+ 28789664 × 0000 that results in 0
+ 28789664 × 30000 which equals 863689920000
+ 28789664 × 100000 giving us 2878966400000
+ 28789664 × 0000000 giving us 0
+ 28789664 × 20000000 giving us 575793280000000

= 579547596133920
