Alright, let's work through 85457640 times 72855065 step by step
85457640 × 72855065 = 72855065 × (85457640)
+ 72855065 × 0 that results in 0
+ 72855065 × 40 what gives us 2914202600
+ 72855065 × 600 giving us 43713039000
+ 72855065 × 7000 resulting in 509985455000
+ 72855065 × 50000 what gives us 3642753250000
+ 72855065 × 400000 giving us 29142026000000
+ 72855065 × 5000000 that results in 364275325000000
+ 72855065 × 80000000 yielding 5828405200000000

= 6226021916946600
