source_code: import java.io.OutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.PrintWriter;
  import java.util.StringTokenizer;
  import java.io.IOException;
  import java.io.BufferedReader;
  import java.io.InputStreamReader;
  import java.io.InputStream;
  
  /**
   * Built using CHelper plug-in
   * Actual solution is at the top
   *
   * @author kessido
   */
  public class Main {
      public static void main(String[] args) {
          InputStream inputStream = System.in;
          OutputStream outputStream = System.out;
          InputReader in = new InputReader(inputStream);
          PrintWriter out = new PrintWriter(outputStream);
          TaskC solver = new TaskC();
          solver.solve(1, in, out);
          out.close();
      }
  
      static class TaskC {
          public void solve(int testNumber, InputReader in, PrintWriter out) {
              long MOD = MathExtentions.DEFAULT_MOD;
              long x = in.NextLong();
              long k = in.NextLong();
              if (x == 0) {
                  out.println(0);
                  return;
              }
              x %= MOD;
              long res = x * MathExtentions.powerMod(2, k + 1, MOD);
              res %= MOD;
              res -= MathExtentions.powerMod(2, k, MOD) - 1;
              res %= MOD;
              while (res < 0) res += MOD;
              while (res >= MOD) res -= MOD;
              out.println(res);
  
          }
  
      }
  
      static class InputReader {
          BufferedReader reader;
          StringTokenizer tokenizer;
  
          public InputReader(InputStream stream) {
              reader = new BufferedReader(new InputStreamReader(stream), 32768);
              tokenizer = null;
          }
  
          public String next() {
              while (tokenizer == null || !tokenizer.hasMoreTokens()) {
                  try {
                      tokenizer = new StringTokenizer(reader.readLine(), " \t\n\r\f,");
                  } catch (IOException e) {
                      throw new RuntimeException(e);
                  }
              }
              return tokenizer.nextToken();
          }
  
          public long NextLong() {
              return Long.parseLong(next());
          }
  
      }
  
      static class MathExtentions {
          public static final long DEFAULT_MOD = 1_000_000_007;
  
          public static long powerMod(final long x, final long y, final long m) {
              if (y == 0)
                  return 1;
  
              long p = powerMod(x, y / 2, m) % m;
              p = (p * p) % m;
  
              if (y % 2 == 0)
                  return p;
              else
                  return (x * p) % m;
          }
  
      }
  }
  
  