Let's roll up our sleeves and solve this. We have 339 and we're going to multiply it by 6, essentially adding 339 to itself 6 times.
Step 1: 0 + 339 = 339
Step 2: 339 + 339 = 678
Step 3: 678 + 339 = 1017
Step 4: 1017 + 339 = 1356
Step 5: 1356 + 339 = 1695
Step 6: 1695 + 339 = 2034

So, 339*6 = 2034