Text function for billions

[Confuddled]

Hi all!

I'm using
=TEXT(S146,"0.0,,") & " million"
to convert

£ 354,691,359 to 354.7 million but what do I use to change it to billions? Thank you Confuddled

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[Chameleon64]

=TEXT(S146/1000,"0.0,,") & " billion"