Alright, let's solve this math problem step by step. First, we have the number 143. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 11. So, we're going to take the number 143 and add it to itself 11 times.
Step 1: 0 + 143 = 143
Step 2: 143 + 143 = 286
Step 3: 286 + 143 = 429
Step 4: 429 + 143 = 572
Step 5: 572 + 143 = 715
Step 6: 715 + 143 = 858
Step 7: 858 + 143 = 1001
Step 8: 1001 + 143 = 1144
Step 9: 1144 + 143 = 1287
Step 10: 1287 + 143 = 1430
Step 11: 1430 + 143 = 1573

So, 143*11 = 1573