"Tôi dùng hai đô la để mua một cái bánh."

Translation: I use two dollars to buy a cake.

[BossaNova1423]

Đô la is dollar? Who could've guessed?

[TranVanHaiNam]

Yes. You can see the hint.

[Raphael_SyBo]

I think he was just being sarcastic haha

[TranVanHaiNam]

That's what you thought, not what I thought ;)

[KirynSilverwing]

That's a cheap cake.

[vngdhuyen]

bánh is any sweet, salty, or savory food prepared from flour (especially rice flour) or pressed grains (such as glutinous rice) and cooked by steaming, baking, frying, deep-frying, or boiling: a pastry, cake, bread, bun, dumpling, noodle, wafer, or pudding.

[MalachyKin1]

(Not language related, feel free to ignore) Are French pastries a thing in Vietnam? Has French colonialism influenced Vietnamese cuisine?

[vngdhuyen]

well yeah, to some extent. the VNmese infamous bánh mì, which uses a 1-foot baguette and pâté, might be the first dish we think of when talking about French influences in culinary. I would then think of pa tê sô, loanword from the French pâté chaud, a meat-filled puff pastry, and bánh bông lan, a sponge cake.

[Brian_KB]

Để not needed here?

[vngdhuyen]

in casual speech, no it wouldn't be necessary.