Alright, let's solve this math problem step by step. First, we have the number 478. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 40. So, we're going to take the number 478 and add it to itself 40 times.
Step 1: 0 + 478 = 478
Step 2: 478 + 478 = 956
Step 3: 956 + 478 = 1434
Step 4: 1434 + 478 = 1912
Step 5: 1912 + 478 = 2390
Step 6: 2390 + 478 = 2868
Step 7: 2868 + 478 = 3346
Step 8: 3346 + 478 = 3824
Step 9: 3824 + 478 = 4302
Step 10: 4302 + 478 = 4780
Step 11: 4780 + 478 = 5258
Step 12: 5258 + 478 = 5736
Step 13: 5736 + 478 = 6214
Step 14: 6214 + 478 = 6692
Step 15: 6692 + 478 = 7170
Step 16: 7170 + 478 = 7648
Step 17: 7648 + 478 = 8126
Step 18: 8126 + 478 = 8604
Step 19: 8604 + 478 = 9082
Step 20: 9082 + 478 = 9560
Step 21: 9560 + 478 = 10038
Step 22: 10038 + 478 = 10516
Step 23: 10516 + 478 = 10994
Step 24: 10994 + 478 = 11472
Step 25: 11472 + 478 = 11950
Step 26: 11950 + 478 = 12428
Step 27: 12428 + 478 = 12906
Step 28: 12906 + 478 = 13384
Step 29: 13384 + 478 = 13862
Step 30: 13862 + 478 = 14340
Step 31: 14340 + 478 = 14818
Step 32: 14818 + 478 = 15296
Step 33: 15296 + 478 = 15774
Step 34: 15774 + 478 = 16252
Step 35: 16252 + 478 = 16730
Step 36: 16730 + 478 = 17208
Step 37: 17208 + 478 = 17686
Step 38: 17686 + 478 = 18164
Step 39: 18164 + 478 = 18642
Step 40: 18642 + 478 = 19120

So, 478*40 = 19120