Alright, let's work through 26481982 times 80640163 step by step
26481982 × 80640163 = 80640163 × (26481982)
+ 80640163 × 2 resulting in 161280326
+ 80640163 × 80 that results in 6451213040
+ 80640163 × 900 giving us 72576146700
+ 80640163 × 1000 that equals 80640163000
+ 80640163 × 80000 what gives us 6451213040000
+ 80640163 × 400000 which equals 32256065200000
+ 80640163 × 6000000 that equals 483840978000000
+ 80640163 × 20000000 resulting in 1612803260000000

= 2135511345043066
