OK, let's crack this. We're given 309 and our task is to multiply it by 6. Essentially, we'll be adding 309 to itself 6 times.
Step 1: 0 + 309 = 309
Step 2: 309 + 309 = 618
Step 3: 618 + 309 = 927
Step 4: 927 + 309 = 1236
Step 5: 1236 + 309 = 1545
Step 6: 1545 + 309 = 1854

So, 309*6 = 1854