No problem, we've got 15219800 and 420430 to multiply
15219800 × 420430 = 420430 × (15219800)
+ 420430 × 0 which equals 0
+ 420430 × 00 that is equal 0
+ 420430 × 800 yielding 336344000
+ 420430 × 9000 that is equal 3783870000
+ 420430 × 10000 that equals 4204300000
+ 420430 × 200000 that results in 84086000000
+ 420430 × 5000000 yielding 2102150000000
+ 420430 × 10000000 giving us 4204300000000

= 6398860514000
