Alright, let's work through 85721629 times 55924394 step by step
85721629 × 55924394 = 55924394 × (85721629)
+ 55924394 × 9 that results in 503319546
+ 55924394 × 20 which equals 1118487880
+ 55924394 × 600 giving us 33554636400
+ 55924394 × 1000 what gives us 55924394000
+ 55924394 × 20000 giving us 1118487880000
+ 55924394 × 700000 giving us 39147075800000
+ 55924394 × 5000000 yielding 279621970000000
+ 55924394 × 80000000 resulting in 4473951520000000

= 4793930154517826
