OK, let's work through this together. We're starting with 829 and we're going to multiply it by 18, which means we add 829 to itself 18 times.
Step 1: 0 + 829 = 829
Step 2: 829 + 829 = 1658
Step 3: 1658 + 829 = 2487
Step 4: 2487 + 829 = 3316
Step 5: 3316 + 829 = 4145
Step 6: 4145 + 829 = 4974
Step 7: 4974 + 829 = 5803
Step 8: 5803 + 829 = 6632
Step 9: 6632 + 829 = 7461
Step 10: 7461 + 829 = 8290
Step 11: 8290 + 829 = 9119
Step 12: 9119 + 829 = 9948
Step 13: 9948 + 829 = 10777
Step 14: 10777 + 829 = 11606
Step 15: 11606 + 829 = 12435
Step 16: 12435 + 829 = 13264
Step 17: 13264 + 829 = 14093
Step 18: 14093 + 829 = 14922

So, 829*18 = 14922