No problem, we've got 71521521 and 72061473 to multiply
71521521 × 72061473 = 72061473 × (71521521)
+ 72061473 × 1 that results in 72061473
+ 72061473 × 20 that equals 1441229460
+ 72061473 × 500 that equals 36030736500
+ 72061473 × 1000 that results in 72061473000
+ 72061473 × 20000 giving us 1441229460000
+ 72061473 × 500000 that results in 36030736500000
+ 72061473 × 1000000 producing 72061473000000
+ 72061473 × 70000000 what gives us 5044303110000000

= 5153946154460433
