Let's get this math done. We have 397 and we're going to multiply it by 18. This is the same as taking 397 and adding it to itself 18 times.
Step 1: 0 + 397 = 397
Step 2: 397 + 397 = 794
Step 3: 794 + 397 = 1191
Step 4: 1191 + 397 = 1588
Step 5: 1588 + 397 = 1985
Step 6: 1985 + 397 = 2382
Step 7: 2382 + 397 = 2779
Step 8: 2779 + 397 = 3176
Step 9: 3176 + 397 = 3573
Step 10: 3573 + 397 = 3970
Step 11: 3970 + 397 = 4367
Step 12: 4367 + 397 = 4764
Step 13: 4764 + 397 = 5161
Step 14: 5161 + 397 = 5558
Step 15: 5558 + 397 = 5955
Step 16: 5955 + 397 = 6352
Step 17: 6352 + 397 = 6749
Step 18: 6749 + 397 = 7146

So, 397*18 = 7146