Alright, let's work through 98312915 times 4040342 step by step
98312915 × 4040342 = 4040342 × (98312915)
+ 4040342 × 5 resulting in 20201710
+ 4040342 × 10 that equals 40403420
+ 4040342 × 900 that equals 3636307800
+ 4040342 × 2000 what gives us 8080684000
+ 4040342 × 10000 resulting in 40403420000
+ 4040342 × 300000 what gives us 1212102600000
+ 4040342 × 8000000 which equals 32322736000000
+ 4040342 × 90000000 yielding 363630780000000

= 397217799616930
