Without delay, let's solve this. We've got 679 and we will be multiplying it by 6, that is, adding 679 to itself 6 times.
Step 1: 0 + 679 = 679
Step 2: 679 + 679 = 1358
Step 3: 1358 + 679 = 2037
Step 4: 2037 + 679 = 2716
Step 5: 2716 + 679 = 3395
Step 6: 3395 + 679 = 4074

So, 679*6 = 4074