The given number in scientific notation is:
[tex]6.546\times10^{-6}[/tex]In order to write it in standard notation, first take a look at the power: -6.
As it is a negative number, it means we need to move the dot to the left 6 units.
Therefore, we need to fill the blank places with zeros:
[tex]6.546\times10^{-6}=0.000006546[/tex]