OK, let's crack this. We're given 912 and our task is to multiply it by 47. Essentially, we'll be adding 912 to itself 47 times.
Step 1: 0 + 912 = 912
Step 2: 912 + 912 = 1824
Step 3: 1824 + 912 = 2736
Step 4: 2736 + 912 = 3648
Step 5: 3648 + 912 = 4560
Step 6: 4560 + 912 = 5472
Step 7: 5472 + 912 = 6384
Step 8: 6384 + 912 = 7296
Step 9: 7296 + 912 = 8208
Step 10: 8208 + 912 = 9120
Step 11: 9120 + 912 = 10032
Step 12: 10032 + 912 = 10944
Step 13: 10944 + 912 = 11856
Step 14: 11856 + 912 = 12768
Step 15: 12768 + 912 = 13680
Step 16: 13680 + 912 = 14592
Step 17: 14592 + 912 = 15504
Step 18: 15504 + 912 = 16416
Step 19: 16416 + 912 = 17328
Step 20: 17328 + 912 = 18240
Step 21: 18240 + 912 = 19152
Step 22: 19152 + 912 = 20064
Step 23: 20064 + 912 = 20976
Step 24: 20976 + 912 = 21888
Step 25: 21888 + 912 = 22800
Step 26: 22800 + 912 = 23712
Step 27: 23712 + 912 = 24624
Step 28: 24624 + 912 = 25536
Step 29: 25536 + 912 = 26448
Step 30: 26448 + 912 = 27360
Step 31: 27360 + 912 = 28272
Step 32: 28272 + 912 = 29184
Step 33: 29184 + 912 = 30096
Step 34: 30096 + 912 = 31008
Step 35: 31008 + 912 = 31920
Step 36: 31920 + 912 = 32832
Step 37: 32832 + 912 = 33744
Step 38: 33744 + 912 = 34656
Step 39: 34656 + 912 = 35568
Step 40: 35568 + 912 = 36480
Step 41: 36480 + 912 = 37392
Step 42: 37392 + 912 = 38304
Step 43: 38304 + 912 = 39216
Step 44: 39216 + 912 = 40128
Step 45: 40128 + 912 = 41040
Step 46: 41040 + 912 = 41952
Step 47: 41952 + 912 = 42864

So, 912*47 = 42864