Alright, let's work through 66172788 times 86296026 step by step
66172788 × 86296026 = 86296026 × (66172788)
+ 86296026 × 8 that equals 690368208
+ 86296026 × 80 yielding 6903682080
+ 86296026 × 700 producing 60407218200
+ 86296026 × 2000 that is equal 172592052000
+ 86296026 × 70000 resulting in 6040721820000
+ 86296026 × 100000 giving us 8629602600000
+ 86296026 × 6000000 that results in 517776156000000
+ 86296026 × 60000000 what gives us 5177761560000000

= 5710448633740488
