OK, let's work through this together. We're starting with 593 and we're going to multiply it by 20, which means we add 593 to itself 20 times.
Step 1: 0 + 593 = 593
Step 2: 593 + 593 = 1186
Step 3: 1186 + 593 = 1779
Step 4: 1779 + 593 = 2372
Step 5: 2372 + 593 = 2965
Step 6: 2965 + 593 = 3558
Step 7: 3558 + 593 = 4151
Step 8: 4151 + 593 = 4744
Step 9: 4744 + 593 = 5337
Step 10: 5337 + 593 = 5930
Step 11: 5930 + 593 = 6523
Step 12: 6523 + 593 = 7116
Step 13: 7116 + 593 = 7709
Step 14: 7709 + 593 = 8302
Step 15: 8302 + 593 = 8895
Step 16: 8895 + 593 = 9488
Step 17: 9488 + 593 = 10081
Step 18: 10081 + 593 = 10674
Step 19: 10674 + 593 = 11267
Step 20: 11267 + 593 = 11860

So, 593*20 = 11860