Alright, let's work through 97873657 times 56149840 step by step
97873657 × 56149840 = 56149840 × (97873657)
+ 56149840 × 7 resulting in 393048880
+ 56149840 × 50 what gives us 2807492000
+ 56149840 × 600 that is equal 33689904000
+ 56149840 × 3000 yielding 168449520000
+ 56149840 × 70000 that results in 3930488800000
+ 56149840 × 800000 which equals 44919872000000
+ 56149840 × 7000000 giving us 393048880000000
+ 56149840 × 90000000 that results in 5053485600000000

= 5495590180764880
