Alright, let's solve this math problem step by step. First, we have the number 130. 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 130 and add it to itself 21 times.
Step 1: 0 + 130 = 130
Step 2: 130 + 130 = 260
Step 3: 260 + 130 = 390
Step 4: 390 + 130 = 520
Step 5: 520 + 130 = 650
Step 6: 650 + 130 = 780
Step 7: 780 + 130 = 910
Step 8: 910 + 130 = 1040
Step 9: 1040 + 130 = 1170
Step 10: 1170 + 130 = 1300
Step 11: 1300 + 130 = 1430
Step 12: 1430 + 130 = 1560
Step 13: 1560 + 130 = 1690
Step 14: 1690 + 130 = 1820
Step 15: 1820 + 130 = 1950
Step 16: 1950 + 130 = 2080
Step 17: 2080 + 130 = 2210
Step 18: 2210 + 130 = 2340
Step 19: 2340 + 130 = 2470
Step 20: 2470 + 130 = 2600
Step 21: 2600 + 130 = 2730

So, 130*21 = 2730