Alright, let's work through 21047810 times 8319117 step by step
21047810 × 8319117 = 8319117 × (21047810)
+ 8319117 × 0 giving us 0
+ 8319117 × 10 yielding 83191170
+ 8319117 × 800 that equals 6655293600
+ 8319117 × 7000 producing 58233819000
+ 8319117 × 40000 giving us 332764680000
+ 8319117 × 000000 giving us 0
+ 8319117 × 1000000 that results in 8319117000000
+ 8319117 × 20000000 giving us 166382340000000

= 175099193983770
