Alright, let's work through 9716872 times 73078729 step by step
9716872 × 73078729 = 73078729 × (9716872)
+ 73078729 × 2 giving us 146157458
+ 73078729 × 70 what gives us 5115511030
+ 73078729 × 800 that results in 58462983200
+ 73078729 × 6000 that equals 438472374000
+ 73078729 × 10000 producing 730787290000
+ 73078729 × 700000 that is equal 51155110300000
+ 73078729 × 9000000 producing 657708561000000

= 710096655615688
