Alright, let's work through 71688001 times 63178703 step by step
71688001 × 63178703 = 63178703 × (71688001)
+ 63178703 × 1 resulting in 63178703
+ 63178703 × 00 giving us 0
+ 63178703 × 000 that is equal 0
+ 63178703 × 8000 producing 505429624000
+ 63178703 × 80000 producing 5054296240000
+ 63178703 × 600000 giving us 37907221800000
+ 63178703 × 1000000 which equals 63178703000000
+ 63178703 × 70000000 that equals 4422509210000000

= 4529154923842703
