No problem, we've got 72479479 and 71277500 to multiply
72479479 × 71277500 = 71277500 × (72479479)
+ 71277500 × 9 which equals 641497500
+ 71277500 × 70 that results in 4989425000
+ 71277500 × 400 that is equal 28511000000
+ 71277500 × 9000 what gives us 641497500000
+ 71277500 × 70000 that is equal 4989425000000
+ 71277500 × 400000 which equals 28511000000000
+ 71277500 × 2000000 which equals 142555000000000
+ 71277500 × 70000000 giving us 4989425000000000

= 5166156064422500
