"まるいスプーンで食べます。"

Translation: I eat with a round spoon.

[Hyperguyver]

I eat with a triangle one

[lcsondes]

Rectangular spoons are clearly superior.

[hiba226886]

三角のスプーンで食べます

[LiKenun]

A garden shovel? :-|

[daniel.z.tg]

I like eating with a spork one.

[denimbluesky]

Me too especially for カレーライス

[Geronimo703758]

That's weird I eat with a shovel

[Boringjorn]

あなたのスプーンは大きすぎます。

[Brendan894147]

私はバナナですよ。
(Apologies if you weren't going for the Don Hertzfeld's "Rejected" reference)

[Darwin27828]

I only eat with a shovel at Camp Express in Shinagawa station.

[philallthethings]

四角いスプーンで食べるww

[Yugenli]

So で also functions as with? Ah I'm confused

[mjsmcp]

で can be used to mean "by means of"

スプーンでたべます "I eat by means of a spoon"

自転車で学校に行きます "I go to school by means of a bicycle"

[Faramond]

Does that mean "I eat using a round spoon," is acceptable?

[Derek003]

Is there something wrong with "I eat using a round spoon," or does Duo need to be educated again?

[cvictoria42]

It's technically okay, but it sounds really unnatural

[Lloyd76445]

I personally prefer a square spoon

[BJCUAl]

「まるいスプーン」なんか聞いたことない。スプーンの基本はそのものの丸さじゃなかった？？Duolingo, you're weird.

[DavidOuyang]

I typed I eat with a round

[JOKOJOKO83]

In this case, the kanji for まるい is 丸い or 円い?

[Frikiman_H]

I think it's both. Sometimes the same word can be written with different kanji.

[Saya763569]

I eat with a Devil's Tuning Fork.

[Nina299471]

When "I will eat" and "I eat" aren't the same thing...

[sotnosen93]

If you mean "I will eat[...]" wasn't accepted, report it. This is the non-past tense, so it can be used for both present and future tense.

[TomTheMystik]

Well I eat with my family but you so you