Three Small Things, Three Things, Three Objects, Three Small Objects
noun
Three individuals is three small things. The kanji 個 can be used to count small objects, just like this! Try other numbers as well.
さんこ
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
コーヒーにはミルクとシロップを三個ずつ入れます。
I put three milks and three syrup cups in my coffee.
三個入りの石けんを一箱買いました。
I bought a box of soap that comes with three bars.
チーズバーガー三個の他に、ナゲットを三十三個も食べたので、今とても気持ちが悪い。
I feel really sick now after eating three cheeseburgers and thirty-three nuggets.