Answer :

[tex]3\times100000 = 3\times10^6 \\ 4\times1000 = 4\times10^3 \\ 2\times10 = 2\times10^1[/tex]

So the final statement would be:
[tex](3\times10^6) + (4\times10^3) + (2\times10^1)[/tex]