Alright, let's solve this math problem step by step. First, we have the number 981. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 13. So, we're going to take the number 981 and add it to itself 13 times.
Step 1: 0 + 981 = 981
Step 2: 981 + 981 = 1962
Step 3: 1962 + 981 = 2943
Step 4: 2943 + 981 = 3924
Step 5: 3924 + 981 = 4905
Step 6: 4905 + 981 = 5886
Step 7: 5886 + 981 = 6867
Step 8: 6867 + 981 = 7848
Step 9: 7848 + 981 = 8829
Step 10: 8829 + 981 = 9810
Step 11: 9810 + 981 = 10791
Step 12: 10791 + 981 = 11772
Step 13: 11772 + 981 = 12753

So, 981*13 = 12753