Alright, let's solve this math problem step by step. First, we have the number 324. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 20. So, we're going to take the number 324 and add it to itself 20 times.
Step 1: 0 + 324 = 324
Step 2: 324 + 324 = 648
Step 3: 648 + 324 = 972
Step 4: 972 + 324 = 1296
Step 5: 1296 + 324 = 1620
Step 6: 1620 + 324 = 1944
Step 7: 1944 + 324 = 2268
Step 8: 2268 + 324 = 2592
Step 9: 2592 + 324 = 2916
Step 10: 2916 + 324 = 3240
Step 11: 3240 + 324 = 3564
Step 12: 3564 + 324 = 3888
Step 13: 3888 + 324 = 4212
Step 14: 4212 + 324 = 4536
Step 15: 4536 + 324 = 4860
Step 16: 4860 + 324 = 5184
Step 17: 5184 + 324 = 5508
Step 18: 5508 + 324 = 5832
Step 19: 5832 + 324 = 6156
Step 20: 6156 + 324 = 6480

So, 324*20 = 6480