What to write in Outputs and process using cucumber as per OOPSI model?

I would add two number

#output --- what to give here as per OOPSI model
#process  --- what to give here as per OOPSI model

Scenario outline:Addition
Given: Add two number
When:Add <number1>
And: Add <number2>
Then : Result <answer>

Examples: Data values
| number1  | number2  |  answer  |
|    1     |    2     |    3     |
|    4     |    4     |    8     |

The above feature file is for testing the addition of two numbers are correct or not. However without following this oopsi model it is working fine. I want to maintain it to oopsi model. What will we have to write in outputs and process to run the code exactly.