Alright, let's work through 89963734 times 40259607 step by step
89963734 × 40259607 = 40259607 × (89963734)
+ 40259607 × 4 resulting in 161038428
+ 40259607 × 30 resulting in 1207788210
+ 40259607 × 700 that equals 28181724900
+ 40259607 × 3000 yielding 120778821000
+ 40259607 × 60000 which equals 2415576420000
+ 40259607 × 900000 giving us 36233646300000
+ 40259607 × 9000000 resulting in 362336463000000
+ 40259607 × 80000000 that equals 3220768560000000

= 3621904575092538
