Alright, let's work through 71394805 times 53861057 step by step
71394805 × 53861057 = 53861057 × (71394805)
+ 53861057 × 5 that equals 269305285
+ 53861057 × 00 producing 0
+ 53861057 × 800 yielding 43088845600
+ 53861057 × 4000 giving us 215444228000
+ 53861057 × 90000 what gives us 4847495130000
+ 53861057 × 300000 that equals 16158317100000
+ 53861057 × 1000000 what gives us 53861057000000
+ 53861057 × 70000000 that is equal 3770273990000000

= 3845399661608885
