Alright, let's work through 6726477 times 63688771 step by step
6726477 × 63688771 = 63688771 × (6726477)
+ 63688771 × 7 that results in 445821397
+ 63688771 × 70 what gives us 4458213970
+ 63688771 × 400 giving us 25475508400
+ 63688771 × 6000 that results in 382132626000
+ 63688771 × 20000 yielding 1273775420000
+ 63688771 × 700000 that is equal 44582139700000
+ 63688771 × 6000000 yielding 382132626000000

= 428401053289767
