No problem, we've got 13685921 and 7840734 to multiply
13685921 × 7840734 = 7840734 × (13685921)
+ 7840734 × 1 what gives us 7840734
+ 7840734 × 20 yielding 156814680
+ 7840734 × 900 that is equal 7056660600
+ 7840734 × 5000 which equals 39203670000
+ 7840734 × 80000 giving us 627258720000
+ 7840734 × 600000 what gives us 4704440400000
+ 7840734 × 3000000 giving us 23522202000000
+ 7840734 × 10000000 resulting in 78407340000000

= 107307666106014
