Format number using decimal format in kotlin

Question

I am facing an issue where I need to do some calculations with a number like for example 5000,00 multiplied it by (1,025^3).

So in

Answer 1

Used:

%.numberf

fun main(args: Array) {
var A: Double
A = readLine()!!.toDouble()
var bla = A*A
var calculator = 3.14159 * bla
println("A=%.4f".format(calculator))
}