No problem, we've got 20660708 and 78398574 to multiply
20660708 × 78398574 = 78398574 × (20660708)
+ 78398574 × 8 yielding 627188592
+ 78398574 × 00 what gives us 0
+ 78398574 × 700 producing 54879001800
+ 78398574 × 0000 that equals 0
+ 78398574 × 60000 that is equal 4703914440000
+ 78398574 × 600000 that results in 47039144400000
+ 78398574 × 0000000 yielding 0
+ 78398574 × 20000000 yielding 1567971480000000

= 1619770045030392
