To find a chord on a piano, first determine the type of chord you want to play (such as a major or minor chord) and the root note of the chord. The root note is the starting point for the chord, and all other notes in the chord will be based off of the root. Once you know the root note, you can use a chord chart or cheat sheet to find the specific notes that make up the chord.
For example, if you want to find a C Major chord, the root note is C, and the notes that make up the chord are C, E, and G. On the piano, you would play these notes together to play a C Major chord. Keep in mind that there are many variations of chord and you can use inversions and voicings to make them sound more interesting, however, this is a basic explanation on how to find the chord on piano.