No problem, we've got 83916407 and 16369200 to multiply
83916407 × 16369200 = 16369200 × (83916407)
+ 16369200 × 7 that equals 114584400
+ 16369200 × 00 resulting in 0
+ 16369200 × 400 that equals 6547680000
+ 16369200 × 6000 that results in 98215200000
+ 16369200 × 10000 that results in 163692000000
+ 16369200 × 900000 that is equal 14732280000000
+ 16369200 × 3000000 giving us 49107600000000
+ 16369200 × 80000000 that results in 1309536000000000

= 1373644449464400
