What's the coding for calculating area of a rectangle

Answer 1

Area = length * width
https://www.mathgoodies.com/lessons/vol1/area_rectangle

Answer 2

Hello Alphaville , I see you're doing Java so I made this quickly with some explanations in the code - if you want to know more feel free to ask
https://code.sololearn.com/cZBITubmcUED/?ref=app

Answer 3

In which programming language? And where is your attempt?