Alright, let's work through 67920221 times 10164955 step by step
67920221 × 10164955 = 10164955 × (67920221)
+ 10164955 × 1 that is equal 10164955
+ 10164955 × 20 resulting in 203299100
+ 10164955 × 200 producing 2032991000
+ 10164955 × 0000 that equals 0
+ 10164955 × 20000 that equals 203299100000
+ 10164955 × 900000 giving us 9148459500000
+ 10164955 × 7000000 resulting in 71154685000000
+ 10164955 × 60000000 that equals 609897300000000

= 690405990055055
