English speakers do this constantly.
Someone asks us a question and we say:
“Hmm…”
“Let’s see…”
“Well…”
“I think…”
“I’m not sure…”
Those phrases give our brains time to think.
Russian has them too.
Ну…
noo…
Well…
Так…
tak…
So / let’s see…
Я думаю…
ya DÚ-ma-yu…
I think…
Не знаю…
nye ZNÁ-yu…
I don’t know…
Сейчас…
see-CHÁS…
One moment / now…
These little phrases are incredibly useful because silence feels much longer when you’re the person trying to answer.
Saying:
Ну… я думаю…
gives your brain another couple of seconds to find what comes next.
You’re still communicating while your brain searches.