I tried it.But the default format--{ejbName}{interfaceType.annotationName}
still works,the format doesn't change to
{ejbName}/{interfaceClass}.
That is
initialContext.lookup("CalculatorRemote"); works
but
initialContext.lookup("Calculator/org.apache.geronimo.samples.slsb.calculator.CalculatorRemote");  failed.

There are my ejb part:
@Remote
interface CalculatorRemote

@Stateless
class Calculator implements CalculatorRemote