Sure thing! We've got 548 and we're gonna multiply it by 30. That's the same as adding 548 to itself 30 times.
Step 1: 0 + 548 = 548
Step 2: 548 + 548 = 1096
Step 3: 1096 + 548 = 1644
Step 4: 1644 + 548 = 2192
Step 5: 2192 + 548 = 2740
Step 6: 2740 + 548 = 3288
Step 7: 3288 + 548 = 3836
Step 8: 3836 + 548 = 4384
Step 9: 4384 + 548 = 4932
Step 10: 4932 + 548 = 5480
Step 11: 5480 + 548 = 6028
Step 12: 6028 + 548 = 6576
Step 13: 6576 + 548 = 7124
Step 14: 7124 + 548 = 7672
Step 15: 7672 + 548 = 8220
Step 16: 8220 + 548 = 8768
Step 17: 8768 + 548 = 9316
Step 18: 9316 + 548 = 9864
Step 19: 9864 + 548 = 10412
Step 20: 10412 + 548 = 10960
Step 21: 10960 + 548 = 11508
Step 22: 11508 + 548 = 12056
Step 23: 12056 + 548 = 12604
Step 24: 12604 + 548 = 13152
Step 25: 13152 + 548 = 13700
Step 26: 13700 + 548 = 14248
Step 27: 14248 + 548 = 14796
Step 28: 14796 + 548 = 15344
Step 29: 15344 + 548 = 15892
Step 30: 15892 + 548 = 16440

So, 548*30 = 16440