Alright, let's work through 67037888 times 10131287 step by step
67037888 × 10131287 = 10131287 × (67037888)
+ 10131287 × 8 which equals 81050296
+ 10131287 × 80 that is equal 810502960
+ 10131287 × 800 producing 8105029600
+ 10131287 × 7000 which equals 70919009000
+ 10131287 × 30000 resulting in 303938610000
+ 10131287 × 000000 giving us 0
+ 10131287 × 7000000 producing 70919009000000
+ 10131287 × 60000000 yielding 607877220000000

= 679180083201856
