Wow, I'm surprised your mommy or daddy let their toddler use the computer! Are you parents on the computer with you? Because little kids shouldn't be on the computer without Mommy or Daddy's help. The computer can be a very scary place sometimes.
Well, sweetie, the answer to your question is simple. Hold up 2 fingers, and then hold up one more. What does that make? 3?
You are a very smart 2 year old! Well done, and I hope you grow up to be a very smart young person!