OK, let's crack this. We're given 392 and our task is to multiply it by 18. Essentially, we'll be adding 392 to itself 18 times.
Step 1: 0 + 392 = 392
Step 2: 392 + 392 = 784
Step 3: 784 + 392 = 1176
Step 4: 1176 + 392 = 1568
Step 5: 1568 + 392 = 1960
Step 6: 1960 + 392 = 2352
Step 7: 2352 + 392 = 2744
Step 8: 2744 + 392 = 3136
Step 9: 3136 + 392 = 3528
Step 10: 3528 + 392 = 3920
Step 11: 3920 + 392 = 4312
Step 12: 4312 + 392 = 4704
Step 13: 4704 + 392 = 5096
Step 14: 5096 + 392 = 5488
Step 15: 5488 + 392 = 5880
Step 16: 5880 + 392 = 6272
Step 17: 6272 + 392 = 6664
Step 18: 6664 + 392 = 7056

So, 392*18 = 7056