One gram equals $1000$ milligrams. The following program intends to read a floating$-$point value from input, convert the value from milligrams to grams, and output the weight in grams, but the code contains three errors. Find and fix all three errors.

Ex: If the input is $2\mathrm{.}0,$ then the output is:

$0\mathrm{.}002$ grams import java.util.Scanner;

public class MilligramsToGrams $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

$//$ Modify the following code

int weightMg;

int weightGrams;

weightMg $=$ scnr$.$nextInt$()$;

weightGrams $=$ weightMg $/1000$;

System.out.printf$("\%\mathrm{.}3$f grams

$",$ weightGrams$)$;

$\}$