Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, your example is written in standard form.
1213
It is 1213.
How do write 666 in standard form?
It is In standard form.
That is the standard form!
1213
It is 1213.
1213 x 246565 = 299083345
Stephen Langton was the Archbishop of Canterbury in 1213.
1213+356 = 1569
It is already in standard form.
9,670 is the standard form.
How do write 666 in standard form?
12 and 13/20
43,962 is the standard form.
It is already in standard form.
It is In standard form.