のも当然だ

JLPT Level: N2
Meanings

it's natural that

no wonder

it's only natural that

Usage

Verb (plain) + のも当然だ

Adjective (plain) + のも当然だ

Noun + のも当然だ

Clause + のも当然だ

Explanation
のも当然だ is used when you point out that a result or reaction is perfectly reasonable given a preceding situation or reason. The の nominalizes the preceding clause, and もさらに当然だ emphasizes that the outcome is expected or unsurprising. It often follows a justification or condition stated earlier in the sentence and is used to justify a reaction, action, or state as reasonable.
彼が怒るのも当然だ。
かれがおこるのもとうぜんだ。

It’s natural that he gets angry.

長時間待たされたのも当然だ。
ちょうじかんまたされたのもとうぜんだ。

It's no wonder you had to wait for so long.

約束を破ったのも当然だ。
やくそくをやぶったのもとうぜんだ。

It's only natural that the promise was broken.

結果が出なかったのも当然だ。
けっかがでなかったのもとうぜんだ。

It's natural that there were no results.