No problem, we've got 80894305 and 64929997 to multiply
80894305 × 64929997 = 64929997 × (80894305)
+ 64929997 × 5 what gives us 324649985
+ 64929997 × 00 that is equal 0
+ 64929997 × 300 that equals 19478999100
+ 64929997 × 4000 what gives us 259719988000
+ 64929997 × 90000 that equals 5843699730000
+ 64929997 × 800000 giving us 51943997600000
+ 64929997 × 0000000 what gives us 0
+ 64929997 × 80000000 producing 5194399760000000

= 5252466980967085
