Alright, let's work through 87834680 times 50978936 step by step
87834680 × 50978936 = 50978936 × (87834680)
+ 50978936 × 0 resulting in 0
+ 50978936 × 80 producing 4078314880
+ 50978936 × 600 resulting in 30587361600
+ 50978936 × 4000 resulting in 203915744000
+ 50978936 × 30000 that results in 1529368080000
+ 50978936 × 800000 that is equal 40783148800000
+ 50978936 × 7000000 producing 356852552000000
+ 50978936 × 80000000 resulting in 4078314880000000

= 4477718530300480
