Alright, let's work through 97899790 times 96854506 step by step
97899790 × 96854506 = 96854506 × (97899790)
+ 96854506 × 0 producing 0
+ 96854506 × 90 resulting in 8716905540
+ 96854506 × 700 what gives us 67798154200
+ 96854506 × 9000 producing 871690554000
+ 96854506 × 90000 giving us 8716905540000
+ 96854506 × 800000 that results in 77483604800000
+ 96854506 × 7000000 that is equal 677981542000000
+ 96854506 × 90000000 that results in 8716905540000000

= 9482035797953740
