Alright, let's work through 98072994 times 86377315 step by step
98072994 × 86377315 = 86377315 × (98072994)
+ 86377315 × 4 what gives us 345509260
+ 86377315 × 90 what gives us 7773958350
+ 86377315 × 900 that is equal 77739583500
+ 86377315 × 2000 that equals 172754630000
+ 86377315 × 70000 giving us 6046412050000
+ 86377315 × 000000 which equals 0
+ 86377315 × 8000000 that equals 691018520000000
+ 86377315 × 90000000 that is equal 7773958350000000

= 8471281895731110
