Let's calculate 42872134 x 87124381
42872134 × 87124381 = 87124381 × (42872134)
+ 87124381 × 4 yielding 348497524
+ 87124381 × 30 producing 2613731430
+ 87124381 × 100 producing 8712438100
+ 87124381 × 2000 which equals 174248762000
+ 87124381 × 70000 that is equal 6098706670000
+ 87124381 × 800000 resulting in 69699504800000
+ 87124381 × 2000000 that results in 174248762000000
+ 87124381 × 40000000 yielding 3484975240000000

= 3735208136899054
