Alright, let's work through 31040715 times 5200870 step by step
31040715 × 5200870 = 5200870 × (31040715)
+ 5200870 × 5 that equals 26004350
+ 5200870 × 10 that is equal 52008700
+ 5200870 × 700 that is equal 3640609000
+ 5200870 × 0000 yielding 0
+ 5200870 × 40000 that equals 208034800000
+ 5200870 × 000000 that results in 0
+ 5200870 × 1000000 giving us 5200870000000
+ 5200870 × 30000000 producing 156026100000000

= 161438723422050
