Alright, let's work through 3143 times 1015 step by step
3143 × 1015 = 1015 × (3143)
+ 1015 × 3 producing 3045
+ 1015 × 40 producing 40600
+ 1015 × 100 what gives us 101500
+ 1015 × 3000 that equals 3045000

= 3190145
