reg --display-amount='amount * 10' books
<<<
2008/01/01 January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 End of January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 End of January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 January
    Expenses:Books          $10.00
    Assets:Cash

2008/01/01 End of January
    Expenses:Books          $10.00
    Assets:Cash

2008/02/01 February
    Expenses:Books          $20.00
    Assets:Cash

2008/02/01 End of February
    Expenses:Books          $20.00
    Assets:Cash

2008/02/01 February
    Expenses:Books          $20.00
    Assets:Cash

2008/02/01 End of February
    Expenses:Books          $20.00
    Assets:Cash

2008/02/01 February
    Expenses:Books          $20.00
    Assets:Cash

2008/02/01 End of February
    Expenses:Books          $20.00
    Assets:Cash

>>>1
08-Jan-01 January               Expenses:Books              $100.00       $10.00
08-Jan-01 End of January        Expenses:Books              $100.00       $20.00
08-Jan-01 January               Expenses:Books              $100.00       $30.00
08-Jan-01 End of January        Expenses:Books              $100.00       $40.00
08-Jan-01 January               Expenses:Books              $100.00       $50.00
08-Jan-01 End of January        Expenses:Books              $100.00       $60.00
08-Feb-01 February              Expenses:Books              $200.00       $80.00
08-Feb-01 End of February       Expenses:Books              $200.00      $100.00
08-Feb-01 February              Expenses:Books              $200.00      $120.00
08-Feb-01 End of February       Expenses:Books              $200.00      $140.00
08-Feb-01 February              Expenses:Books              $200.00      $160.00
08-Feb-01 End of February       Expenses:Books              $200.00      $180.00
>>>2
=== 0
