OK, let's work through this together. We're starting with 328 and we're going to multiply it by 54, which means we add 328 to itself 54 times.
Step 1: 0 + 328 = 328
Step 2: 328 + 328 = 656
Step 3: 656 + 328 = 984
Step 4: 984 + 328 = 1312
Step 5: 1312 + 328 = 1640
Step 6: 1640 + 328 = 1968
Step 7: 1968 + 328 = 2296
Step 8: 2296 + 328 = 2624
Step 9: 2624 + 328 = 2952
Step 10: 2952 + 328 = 3280
Step 11: 3280 + 328 = 3608
Step 12: 3608 + 328 = 3936
Step 13: 3936 + 328 = 4264
Step 14: 4264 + 328 = 4592
Step 15: 4592 + 328 = 4920
Step 16: 4920 + 328 = 5248
Step 17: 5248 + 328 = 5576
Step 18: 5576 + 328 = 5904
Step 19: 5904 + 328 = 6232
Step 20: 6232 + 328 = 6560
Step 21: 6560 + 328 = 6888
Step 22: 6888 + 328 = 7216
Step 23: 7216 + 328 = 7544
Step 24: 7544 + 328 = 7872
Step 25: 7872 + 328 = 8200
Step 26: 8200 + 328 = 8528
Step 27: 8528 + 328 = 8856
Step 28: 8856 + 328 = 9184
Step 29: 9184 + 328 = 9512
Step 30: 9512 + 328 = 9840
Step 31: 9840 + 328 = 10168
Step 32: 10168 + 328 = 10496
Step 33: 10496 + 328 = 10824
Step 34: 10824 + 328 = 11152
Step 35: 11152 + 328 = 11480
Step 36: 11480 + 328 = 11808
Step 37: 11808 + 328 = 12136
Step 38: 12136 + 328 = 12464
Step 39: 12464 + 328 = 12792
Step 40: 12792 + 328 = 13120
Step 41: 13120 + 328 = 13448
Step 42: 13448 + 328 = 13776
Step 43: 13776 + 328 = 14104
Step 44: 14104 + 328 = 14432
Step 45: 14432 + 328 = 14760
Step 46: 14760 + 328 = 15088
Step 47: 15088 + 328 = 15416
Step 48: 15416 + 328 = 15744
Step 49: 15744 + 328 = 16072
Step 50: 16072 + 328 = 16400
Step 51: 16400 + 328 = 16728
Step 52: 16728 + 328 = 17056
Step 53: 17056 + 328 = 17384
Step 54: 17384 + 328 = 17712

So, 328*54 = 17712