The way you wrote it is the standard notation. Standard notation means to write the number in its standard form. So, a number such as 150 is simply written as 150 in standard notation. The same applies to decimals.
How do write 666 in standard form?
It is already in standard form.
That is the standard form!
That IS the standard form.
That is the standard form.
You write 20.7 in standard form as: 2.07 × 101
You write 6.11 in standard form as 6.11 × 100
You write 7.54103 in standard form as 7.54103 × 100
You write 83,539,131 in standard form as 8.3539131 × 107
The standard form is: 2,348
The standard form is 283,427
The standard form is: 7,590,000