Alright, let's work through 64787437 times 76827527 step by step
64787437 × 76827527 = 76827527 × (64787437)
+ 76827527 × 7 producing 537792689
+ 76827527 × 30 what gives us 2304825810
+ 76827527 × 400 that results in 30731010800
+ 76827527 × 7000 which equals 537792689000
+ 76827527 × 80000 resulting in 6146202160000
+ 76827527 × 700000 which equals 53779268900000
+ 76827527 × 4000000 resulting in 307310108000000
+ 76827527 × 60000000 that equals 4609651620000000

= 4977458565378299
