We're going to solve 87340487 multiplied by 78721440
87340487 × 78721440 = 78721440 × (87340487)
+ 78721440 × 7 which equals 551050080
+ 78721440 × 80 that is equal 6297715200
+ 78721440 × 400 yielding 31488576000
+ 78721440 × 0000 giving us 0
+ 78721440 × 40000 which equals 3148857600000
+ 78721440 × 300000 yielding 23616432000000
+ 78721440 × 7000000 resulting in 551050080000000
+ 78721440 × 80000000 what gives us 6297715200000000

= 6875568906941280
