Sure thing, let's get straight to it. We start with 906 and we're going to multiply it by 20, which means adding 906 to itself 20 times.
Step 1: 0 + 906 = 906
Step 2: 906 + 906 = 1812
Step 3: 1812 + 906 = 2718
Step 4: 2718 + 906 = 3624
Step 5: 3624 + 906 = 4530
Step 6: 4530 + 906 = 5436
Step 7: 5436 + 906 = 6342
Step 8: 6342 + 906 = 7248
Step 9: 7248 + 906 = 8154
Step 10: 8154 + 906 = 9060
Step 11: 9060 + 906 = 9966
Step 12: 9966 + 906 = 10872
Step 13: 10872 + 906 = 11778
Step 14: 11778 + 906 = 12684
Step 15: 12684 + 906 = 13590
Step 16: 13590 + 906 = 14496
Step 17: 14496 + 906 = 15402
Step 18: 15402 + 906 = 16308
Step 19: 16308 + 906 = 17214
Step 20: 17214 + 906 = 18120

So, 906*20 = 18120