static void solve ( ) {
  int n = in . nextInt ( ) ;
  int m = in . nextInt ( ) ;
  long [ ] x = new long [ n ] ;
  long [ ] y = new long [ m ] ;
  long sumX = 0 , sumY = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    x [ i ] = in . nextInt ( ) ;
    if ( i != 0 ) sumX = ( sumX + ( x [ i ] - x [ i - 1 ] ) * i % MOD * ( n - i ) % MOD ) % MOD ;
  }
  for ( int i = 0 ;
  i < m ;
  i ++ ) {
    y [ i ] = in . nextInt ( ) ;
    if ( i != 0 ) sumY = ( sumY + ( y [ i ] - y [ i - 1 ] ) * i % MOD * ( m - i ) % MOD ) % MOD ;
  }
  out . println ( sumX * sumY % MOD ) ;
}

static void solve ( ) { int n = in . nextInt ( ) ; int m = in . nextInt ( ) ; long [ ] x = new long [ n ] ; long [ ] y = new long [ m ] ; long sumX = 0 , sumY = 0 ; for ( int i = 0 ; i < n ; i ++ ) { x [ i ] = in . nextInt ( ) ; if ( i != 0 ) sumX = ( sumX + ( x [ i ] - x [ i - 1 ] ) * i % MOD * ( n - i ) % MOD ) % MOD ; } for ( int i = 0 ; i < m ; i ++ ) { y [ i ] = in . nextInt ( ) ; if ( i != 0 ) sumY = ( sumY + ( y [ i ] - y [ i - 1 ] ) * i % MOD * ( m - i ) % MOD ) % MOD ; } out . println ( sumX * sumY % MOD ) ; }
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