Alright, let's work through 85330399 times 65173352 step by step
85330399 × 65173352 = 65173352 × (85330399)
+ 65173352 × 9 yielding 586560168
+ 65173352 × 90 which equals 5865601680
+ 65173352 × 300 which equals 19552005600
+ 65173352 × 0000 that results in 0
+ 65173352 × 30000 that results in 1955200560000
+ 65173352 × 300000 what gives us 19552005600000
+ 65173352 × 5000000 that equals 325866760000000
+ 65173352 × 80000000 yielding 5213868160000000

= 5561268130327448
