No problem, we've got 72116478 and 78313271 to multiply
72116478 × 78313271 = 78313271 × (72116478)
+ 78313271 × 8 what gives us 626506168
+ 78313271 × 70 giving us 5481928970
+ 78313271 × 400 what gives us 31325308400
+ 78313271 × 6000 which equals 469879626000
+ 78313271 × 10000 that equals 783132710000
+ 78313271 × 100000 that results in 7831327100000
+ 78313271 × 2000000 that is equal 156626542000000
+ 78313271 × 70000000 yielding 5481928970000000

= 5647677285179538
