No problem, we've got 16428860 and 84172003 to multiply
16428860 × 84172003 = 84172003 × (16428860)
+ 84172003 × 0 that is equal 0
+ 84172003 × 60 resulting in 5050320180
+ 84172003 × 800 which equals 67337602400
+ 84172003 × 8000 yielding 673376024000
+ 84172003 × 20000 resulting in 1683440060000
+ 84172003 × 400000 yielding 33668801200000
+ 84172003 × 6000000 that is equal 505032018000000
+ 84172003 × 10000000 producing 841720030000000

= 1382850053206580
