Alright, let's work through 78023859 times 74405893 step by step
78023859 × 74405893 = 74405893 × (78023859)
+ 74405893 × 9 that is equal 669653037
+ 74405893 × 50 that equals 3720294650
+ 74405893 × 800 which equals 59524714400
+ 74405893 × 3000 that results in 223217679000
+ 74405893 × 20000 that is equal 1488117860000
+ 74405893 × 000000 which equals 0
+ 74405893 × 8000000 what gives us 595247144000000
+ 74405893 × 70000000 that equals 5208412510000000

= 5805434904201087
