@When("^I divide (\\d+) with (\\d+)$")
 public void i_div_with(int arg1, int arg2) throws Throwable {
   try {
     calculadora.divide(arg1, arg2);
   } catch (Throwable t) {
     throwable = t;
   }
 }
 @Then("^the result should be (\\d+)$")
 public void the_result_should_be(int result) throws Throwable {
   assertEquals(result, calculadora.getResult());
 }
 @When("^I multiply (\\d+) with (\\d+)$")
 public void i_mult_with(int arg1, int arg2) throws Throwable {
   calculadora.multiply(arg1, arg2);
 }
 @When("^I sum (\\d+) with (\\d+)$")
 public void i_sum_with(int arg1, int arg2) throws Throwable {
   calculadora.add(arg1, arg2);
 }