No problem, we've got 71919587 and 40729397 to multiply
71919587 × 40729397 = 40729397 × (71919587)
+ 40729397 × 7 what gives us 285105779
+ 40729397 × 80 giving us 3258351760
+ 40729397 × 500 which equals 20364698500
+ 40729397 × 9000 yielding 366564573000
+ 40729397 × 10000 which equals 407293970000
+ 40729397 × 900000 that is equal 36656457300000
+ 40729397 × 1000000 which equals 40729397000000
+ 40729397 × 70000000 giving us 2851057790000000

= 2929241410999039
