Alright, let's work through 66643307 times 20150834 step by step
66643307 × 20150834 = 20150834 × (66643307)
+ 20150834 × 7 resulting in 141055838
+ 20150834 × 00 giving us 0
+ 20150834 × 300 producing 6045250200
+ 20150834 × 3000 yielding 60452502000
+ 20150834 × 40000 giving us 806033360000
+ 20150834 × 600000 that is equal 12090500400000
+ 20150834 × 6000000 that equals 120905004000000
+ 20150834 × 60000000 giving us 1209050040000000

= 1342918216568038
