Alright, let's solve this math problem step by step. First, we have the number 429. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 2. So, we're going to take the number 429 and add it to itself 2 times.
Step 1: 0 + 429 = 429
Step 2: 429 + 429 = 858

So, 429*2 = 858