OK, let's work through this together. We're starting with 373 and we're going to multiply it by 13, which means we add 373 to itself 13 times.
Step 1: 0 + 373 = 373
Step 2: 373 + 373 = 746
Step 3: 746 + 373 = 1119
Step 4: 1119 + 373 = 1492
Step 5: 1492 + 373 = 1865
Step 6: 1865 + 373 = 2238
Step 7: 2238 + 373 = 2611
Step 8: 2611 + 373 = 2984
Step 9: 2984 + 373 = 3357
Step 10: 3357 + 373 = 3730
Step 11: 3730 + 373 = 4103
Step 12: 4103 + 373 = 4476
Step 13: 4476 + 373 = 4849

So, 373*13 = 4849