Answer:
646,880
Explanation:
Start with your exponents.
[tex](2.08*10^3)*(3.11*10^2)\\(2.08*1000)*(3.11*100)[/tex]
Next, multiply within your parentheses.
[tex](2.08*1000)*(3.11*100)\\2080*311[/tex]
Finally, multiply your two terms against each other.
[tex]2080*311\\646880[/tex]