The funny thing is, that most of the world uses commas as decimal separator and comma is the preferred decimal separator by ISO. But instead, in English speaking countries, the period is used as the decimal separator. Actually it comes from the original decimal separator, that was used in the British Empire called ⟨·⟩. When they were changing units to metric, ISO didn’t recognize interpunct as a decimal separator, because it was too similar to the multiplication sign used in other countries. So after some debate in the UK, they’ve adopted the period, because the US was already using it. From the British Empire, South Africa instead adopted the comma.
IIRC if DC became a state, only specific federal buildings, such as the white house, scotus & the capitol buildings would remain as a territory (due to the constitution), but, because of a amendment to the us constitution giving DC the same amount of voters _(members of the electoral college)_for the president as the lowest-representation (essentially always 3), which only citizens living inside the area would be allowed to vote for, only the citizens of white house would be able to vote for 3 whole electors.
I might be incirrect, as I am not a US citizen, but I’ve seen this mentioned somewhere long ago