Alright, let's work through 90874934 times 12960644 step by step
90874934 × 12960644 = 12960644 × (90874934)
+ 12960644 × 4 producing 51842576
+ 12960644 × 30 that equals 388819320
+ 12960644 × 900 that is equal 11664579600
+ 12960644 × 4000 that results in 51842576000
+ 12960644 × 70000 that equals 907245080000
+ 12960644 × 800000 that is equal 10368515200000
+ 12960644 × 0000000 producing 0
+ 12960644 × 90000000 that is equal 1166457960000000

= 1177797668097496
