How do you round a digit to the nearest place

Let's say we have the decimal 6.987654321

If we wanted to round it to the tenth decimal place, we'd write it as 6.98 because the tenth is to the second decimal place.

If we wanted to round it to the thousandth decimal place, we'd write it as 6.987.

Ten-thousandth would be 6.9876

hundred-thousandth would b 6.98765

And so on