Without delay, let's solve this. We've got 312 and we will be multiplying it by 6, that is, adding 312 to itself 6 times.
Step 1: 0 + 312 = 312
Step 2: 312 + 312 = 624
Step 3: 624 + 312 = 936
Step 4: 936 + 312 = 1248
Step 5: 1248 + 312 = 1560
Step 6: 1560 + 312 = 1872

So, 312*6 = 1872