Alright, let's work through 56991988 times 65710428 step by step
56991988 × 65710428 = 65710428 × (56991988)
+ 65710428 × 8 which equals 525683424
+ 65710428 × 80 giving us 5256834240
+ 65710428 × 900 producing 59139385200
+ 65710428 × 1000 producing 65710428000
+ 65710428 × 90000 that equals 5913938520000
+ 65710428 × 900000 yielding 59139385200000
+ 65710428 × 6000000 that is equal 394262568000000
+ 65710428 × 50000000 giving us 3285521400000000

= 3744967924050864
