OK, let's crack this. We're given 312 and our task is to multiply it by 8. Essentially, we'll be adding 312 to itself 8 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
Step 7: 1872 + 312 = 2184
Step 8: 2184 + 312 = 2496

So, 312*8 = 2496