OK, let's crack this. We're given 407 and our task is to multiply it by 6. Essentially, we'll be adding 407 to itself 6 times.
Step 1: 0 + 407 = 407
Step 2: 407 + 407 = 814
Step 3: 814 + 407 = 1221
Step 4: 1221 + 407 = 1628
Step 5: 1628 + 407 = 2035
Step 6: 2035 + 407 = 2442

So, 407*6 = 2442