Alright, let's solve this math problem step by step. First, we have the number 69. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 21. So, we're going to take the number 69 and add it to itself 21 times.
Step 1: 0 + 69 = 69
Step 2: 69 + 69 = 138
Step 3: 138 + 69 = 207
Step 4: 207 + 69 = 276
Step 5: 276 + 69 = 345
Step 6: 345 + 69 = 414
Step 7: 414 + 69 = 483
Step 8: 483 + 69 = 552
Step 9: 552 + 69 = 621
Step 10: 621 + 69 = 690
Step 11: 690 + 69 = 759
Step 12: 759 + 69 = 828
Step 13: 828 + 69 = 897
Step 14: 897 + 69 = 966
Step 15: 966 + 69 = 1035
Step 16: 1035 + 69 = 1104
Step 17: 1104 + 69 = 1173
Step 18: 1173 + 69 = 1242
Step 19: 1242 + 69 = 1311
Step 20: 1311 + 69 = 1380
Step 21: 1380 + 69 = 1449

So, 69*21 = 1449