Sure thing, let's get straight to it. We start with 424 and we're going to multiply it by 30, which means adding 424 to itself 30 times.
Step 1: 0 + 424 = 424
Step 2: 424 + 424 = 848
Step 3: 848 + 424 = 1272
Step 4: 1272 + 424 = 1696
Step 5: 1696 + 424 = 2120
Step 6: 2120 + 424 = 2544
Step 7: 2544 + 424 = 2968
Step 8: 2968 + 424 = 3392
Step 9: 3392 + 424 = 3816
Step 10: 3816 + 424 = 4240
Step 11: 4240 + 424 = 4664
Step 12: 4664 + 424 = 5088
Step 13: 5088 + 424 = 5512
Step 14: 5512 + 424 = 5936
Step 15: 5936 + 424 = 6360
Step 16: 6360 + 424 = 6784
Step 17: 6784 + 424 = 7208
Step 18: 7208 + 424 = 7632
Step 19: 7632 + 424 = 8056
Step 20: 8056 + 424 = 8480
Step 21: 8480 + 424 = 8904
Step 22: 8904 + 424 = 9328
Step 23: 9328 + 424 = 9752
Step 24: 9752 + 424 = 10176
Step 25: 10176 + 424 = 10600
Step 26: 10600 + 424 = 11024
Step 27: 11024 + 424 = 11448
Step 28: 11448 + 424 = 11872
Step 29: 11872 + 424 = 12296
Step 30: 12296 + 424 = 12720

So, 424*30 = 12720