Algorithm:

Step 1: First get the number of free block and store it in a variable "blocks".

Step 2: Assign "true" to a Boolean variable "flag".

Step 3: WHILE "flag".

Step 4: Get the size of the file in bytes and store it in a variable "size".

Step 5: Calculate the compressed size of the file and store it in a variable "compress".

Step 6: Calculate number of blocks required for the file and store it in a variable "blocksNeeded". This is done by dividing "compress" by 512.

Step 7: Check if the "blocksNeeded" is less than "blocks".

Step 8: If the condition is true then reduce the number of free blocks. This is done by subtracting "blocksNeeded" from "blocks".

Step 9: If the condition is false then assign "false" to the variable "flag".

Complete program:

//Import required packages

import static java.lang.Math.round;

import java.util.*;

//Define the main class

public class FileSize

{

//Define the main method

public static void main(String[] args)

{

//Declare required variables

double blocks, size;

boolean flag = true;

//Create an object for scanner class

Scanner sc = new Scanner(System.in);

//Get the number of free blocks

System.out.print("Enter the number of free blocks: ");

blocks = sc.nextInt();

//While true

while(flag)

{

//Declare required variables

double compress = 0, blocksNeeded = 0;

//Get the size of the file

System.out.print("\nEnter the size of file in bytes: ");

size = sc...