No problem, we've got 64789678 and 80695632 to multiply
64789678 × 80695632 = 80695632 × (64789678)
+ 80695632 × 8 what gives us 645565056
+ 80695632 × 70 producing 5648694240
+ 80695632 × 600 that is equal 48417379200
+ 80695632 × 9000 yielding 726260688000
+ 80695632 × 80000 which equals 6455650560000
+ 80695632 × 700000 that equals 56486942400000
+ 80695632 × 4000000 that equals 322782528000000
+ 80695632 × 60000000 producing 4841737920000000

= 5228244013286496
