事(こと)によってvia, through, by doing, by means of, using

箸(はし)を使(つか)う事(こと)によって細(こま)かい物(もの)を掴(つか)めます。

You can pick up small things by using chopsticks. {via, through, by doing, by means of, using}

先生(せんせい)：「沢山(たくさん)練習(れんしゅう)をする事(こと)によって上達(じょうたつ)します。」

Teacher: "You will improve by doing a lot of practice." {via, through, by doing, by means of, using}

上司(じょうし)：「プレゼンを何(なん)度(ど)もする事(こと)によって自信(じしん)がつくよ！」

Boss: "You gain confidence by doing presentations many times!" {via, through, by doing, by means of, using}

ホラー映画(えいが)を観(み)る事(こと)によって暑(あつ)い夏(なつ)を涼(すず)しくする事(こと)が出来(でき)ます。

You can cool down a hot summer by watching horror movies. {via, through, by doing, by means of, using}

しっかり働(はたら)いて業績(ぎょうせき)を上(あ)げる事(こと)によって社長(しゃちょう)に認(みと)められたのである。

He was recognized by the president through working hard and improving his performance. {via, through, by doing, by means of, using}