Without delay, let's solve this. We've got 691 and we will be multiplying it by 6, that is, adding 691 to itself 6 times.
Step 1: 0 + 691 = 691
Step 2: 691 + 691 = 1382
Step 3: 1382 + 691 = 2073
Step 4: 2073 + 691 = 2764
Step 5: 2764 + 691 = 3455
Step 6: 3455 + 691 = 4146

So, 691*6 = 4146