import java.util.Scanner;

///////////////////////////////////////////////////////////////////////////
// Do not import any additional classes beyond the one included above    //
// Also, do not change any of the given code.  Only add code immediately //
// below the two "ADD CODE HERE, AS NEEDED" comments.                    //
///////////////////////////////////////////////////////////////////////////

public class Multiply {
    
    private static final char SPACE = ' ';
    private static final int ROW_OF_FIRST_SUMMAND = 3;
    
    public static int value(char digit) { // presumes digit is in '0'..'9' or 'A'..'F'
        return ((digit >= '0' && digit <= '9') ? (int)  (digit - '0') : (int) (digit - 'A' + 10));
    }
    
    public static char digit(int value) { // presumes digit is in 0..15
        return (value < 10 ? (char) (value + '0') : (char) (value - 10 + 'A'));
    }
    
    public static String workToStr(char[][] work) {
        String s = "";
        for (int r = 0; r < work.length; r++) {
            s += (r == 1 ? 'x' : SPACE);
            for (int c = 0; c < work[0].length; c++) {
                s += work[r][c];
            }
            s += System.lineSeparator();
        }
        return s;
    }
    
    public static char[][] removeColumnsOfSpaces(char[][] w) {
        
        int numColsOfSpacesOnLeft = -1;
        boolean isEmpty = true;
        while (isEmpty) {
            for (int r = 0; r < w.length; r++) {
                isEmpty = isEmpty && (w[r][numColsOfSpacesOnLeft+1] == SPACE);
            }
            numColsOfSpacesOnLeft++;
        }
        
        char[][] wNew = new char[w.length][w[0].length-numColsOfSpacesOnLeft];
        for (int r = 0; r < w.length; r++) {
            for (int c = 0; c < w[0].length - numColsOfSpacesOnLeft; c++) {
                wNew[r][c] = w[r][c+numColsOfSpacesOnLeft];
            }
        }
        return wNew;
    }
    
    public static String multiply(String numOnTop, String numOnBottom, int base) {
        
        int numRows = numOnBottom.length()+5; 
        // i.e., one line for each intermediate calculation (one per digit in number on bottom) plus 
        // a line for each number multiplied, two horizontal lines, and the answer.
       

        //////////////////////////////
        // ADD CODE HERE, AS NEEDED //
        //////////////////////////////
       

        // all cells in the array below, which should contain the "work" of the multiplication
	// are initially filled with SPACE
        char[][] work = new char[numRows][maxNumDigitsInResult];
        for (int rw = 0; rw < numRows; rw++) {
            for (int cw = 0; cw < maxNumDigitsInResult; cw++)
                work[rw][cw] = SPACE;  
        }


        //////////////////////////////
        // ADD CODE HERE, AS NEEDED //
        //////////////////////////////
        

        // the code below fills in rows 1-3 and the second to last row for you
        // (i.e., which contain the first number; the second number, and the two dashed underlines)
        int workWidth = work[0].length;
        work[0] = ((""+SPACE).repeat(workWidth - numOnTop.length()) + numOnTop).toCharArray();
        work[1] = ((""+SPACE).repeat(workWidth - numOnBottom.length()) + numOnBottom).toCharArray();
        work[2] = "-".repeat(workWidth).toCharArray();
        work[work.length-2] = "-".repeat(workWidth).toCharArray();
        
        return workToStr(work);
    }

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter two numbers to multiply and the base in" + System.lineSeparator() +
                           "which to multiply them (separated by spaces):");
        String n = scanner.next();
        String m = scanner.next();
        int base = scanner.nextInt();
        scanner.close();
        String work = multiply(n,m,base);
        System.out.println();
        System.out.println(work);
    }
}