Alright, let's work through 85115358 times 87104710 step by step
85115358 × 87104710 = 87104710 × (85115358)
+ 87104710 × 8 what gives us 696837680
+ 87104710 × 50 yielding 4355235500
+ 87104710 × 300 producing 26131413000
+ 87104710 × 5000 that results in 435523550000
+ 87104710 × 10000 giving us 871047100000
+ 87104710 × 100000 producing 8710471000000
+ 87104710 × 5000000 resulting in 435523550000000
+ 87104710 × 80000000 that is equal 6968376800000000

= 7413948575136180
