OK, let's crack this. We're given 858 and our task is to multiply it by 6. Essentially, we'll be adding 858 to itself 6 times.
Step 1: 0 + 858 = 858
Step 2: 858 + 858 = 1716
Step 3: 1716 + 858 = 2574
Step 4: 2574 + 858 = 3432
Step 5: 3432 + 858 = 4290
Step 6: 4290 + 858 = 5148

So, 858*6 = 5148