Alright, let's work through 67420672 times 90002537 step by step
67420672 × 90002537 = 90002537 × (67420672)
+ 90002537 × 2 that equals 180005074
+ 90002537 × 70 that results in 6300177590
+ 90002537 × 600 resulting in 54001522200
+ 90002537 × 0000 giving us 0
+ 90002537 × 20000 that results in 1800050740000
+ 90002537 × 400000 resulting in 36001014800000
+ 90002537 × 7000000 producing 630017759000000
+ 90002537 × 60000000 giving us 5400152220000000

= 6068031526244864
