Alright, let's work through 89135748 times 45961144 step by step
89135748 × 45961144 = 45961144 × (89135748)
+ 45961144 × 8 resulting in 367689152
+ 45961144 × 40 what gives us 1838445760
+ 45961144 × 700 yielding 32172800800
+ 45961144 × 5000 what gives us 229805720000
+ 45961144 × 30000 giving us 1378834320000
+ 45961144 × 100000 giving us 4596114400000
+ 45961144 × 9000000 that results in 413650296000000
+ 45961144 × 80000000 yielding 3676891520000000

= 4096780949375712
