Alright, let's work through 61827307 times 71397621 step by step
61827307 × 71397621 = 71397621 × (61827307)
+ 71397621 × 7 producing 499783347
+ 71397621 × 00 resulting in 0
+ 71397621 × 300 giving us 21419286300
+ 71397621 × 7000 that results in 499783347000
+ 71397621 × 20000 that results in 1427952420000
+ 71397621 × 800000 which equals 57118096800000
+ 71397621 × 1000000 resulting in 71397621000000
+ 71397621 × 60000000 yielding 4283857260000000

= 4414322632636647
