OK, let's work through this together. We're starting with 839 and we're going to multiply it by 6, which means we add 839 to itself 6 times.
Step 1: 0 + 839 = 839
Step 2: 839 + 839 = 1678
Step 3: 1678 + 839 = 2517
Step 4: 2517 + 839 = 3356
Step 5: 3356 + 839 = 4195
Step 6: 4195 + 839 = 5034

So, 839*6 = 5034