Alright, let's work through 97099235 times 80600402 step by step
97099235 × 80600402 = 80600402 × (97099235)
+ 80600402 × 5 giving us 403002010
+ 80600402 × 30 giving us 2418012060
+ 80600402 × 200 yielding 16120080400
+ 80600402 × 9000 resulting in 725403618000
+ 80600402 × 90000 what gives us 7254036180000
+ 80600402 × 000000 resulting in 0
+ 80600402 × 7000000 yielding 564202814000000
+ 80600402 × 90000000 yielding 7254036180000000

= 7826237374892470
