Alright, let's work through 31498937 times 67103908 step by step
31498937 × 67103908 = 67103908 × (31498937)
+ 67103908 × 7 what gives us 469727356
+ 67103908 × 30 which equals 2013117240
+ 67103908 × 900 producing 60393517200
+ 67103908 × 8000 resulting in 536831264000
+ 67103908 × 90000 producing 6039351720000
+ 67103908 × 400000 that equals 26841563200000
+ 67103908 × 1000000 resulting in 67103908000000
+ 67103908 × 30000000 which equals 2013117240000000

= 2113701770545796
