Alright, let's solve this math problem step by step. First, we have the number 989. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 15. So, we're going to take the number 989 and add it to itself 15 times.
Step 1: 0 + 989 = 989
Step 2: 989 + 989 = 1978
Step 3: 1978 + 989 = 2967
Step 4: 2967 + 989 = 3956
Step 5: 3956 + 989 = 4945
Step 6: 4945 + 989 = 5934
Step 7: 5934 + 989 = 6923
Step 8: 6923 + 989 = 7912
Step 9: 7912 + 989 = 8901
Step 10: 8901 + 989 = 9890
Step 11: 9890 + 989 = 10879
Step 12: 10879 + 989 = 11868
Step 13: 11868 + 989 = 12857
Step 14: 12857 + 989 = 13846
Step 15: 13846 + 989 = 14835

So, 989*15 = 14835