No problem, we've got 71289912 and 71645900 to multiply
71289912 × 71645900 = 71645900 × (71289912)
+ 71645900 × 2 what gives us 143291800
+ 71645900 × 10 producing 716459000
+ 71645900 × 900 that equals 64481310000
+ 71645900 × 9000 that results in 644813100000
+ 71645900 × 80000 resulting in 5731672000000
+ 71645900 × 200000 resulting in 14329180000000
+ 71645900 × 1000000 giving us 71645900000000
+ 71645900 × 70000000 producing 5015213000000000

= 5107629906160800
