Alright, let's work through 89374296 times 47644257 step by step
89374296 × 47644257 = 47644257 × (89374296)
+ 47644257 × 6 which equals 285865542
+ 47644257 × 90 yielding 4287983130
+ 47644257 × 200 that is equal 9528851400
+ 47644257 × 4000 that equals 190577028000
+ 47644257 × 70000 producing 3335097990000
+ 47644257 × 300000 giving us 14293277100000
+ 47644257 × 9000000 producing 428798313000000
+ 47644257 × 80000000 resulting in 3811540560000000

= 4258171927818072
