Alright, let's solve this math problem step by step. First, we have the number 878. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 17. So, we're going to take the number 878 and add it to itself 17 times.
Step 1: 0 + 878 = 878
Step 2: 878 + 878 = 1756
Step 3: 1756 + 878 = 2634
Step 4: 2634 + 878 = 3512
Step 5: 3512 + 878 = 4390
Step 6: 4390 + 878 = 5268
Step 7: 5268 + 878 = 6146
Step 8: 6146 + 878 = 7024
Step 9: 7024 + 878 = 7902
Step 10: 7902 + 878 = 8780
Step 11: 8780 + 878 = 9658
Step 12: 9658 + 878 = 10536
Step 13: 10536 + 878 = 11414
Step 14: 11414 + 878 = 12292
Step 15: 12292 + 878 = 13170
Step 16: 13170 + 878 = 14048
Step 17: 14048 + 878 = 14926

So, 878*17 = 14926