Sure thing, let's get straight to it. We start with 561 and we're going to multiply it by 28, which means adding 561 to itself 28 times.
Step 1: 0 + 561 = 561
Step 2: 561 + 561 = 1122
Step 3: 1122 + 561 = 1683
Step 4: 1683 + 561 = 2244
Step 5: 2244 + 561 = 2805
Step 6: 2805 + 561 = 3366
Step 7: 3366 + 561 = 3927
Step 8: 3927 + 561 = 4488
Step 9: 4488 + 561 = 5049
Step 10: 5049 + 561 = 5610
Step 11: 5610 + 561 = 6171
Step 12: 6171 + 561 = 6732
Step 13: 6732 + 561 = 7293
Step 14: 7293 + 561 = 7854
Step 15: 7854 + 561 = 8415
Step 16: 8415 + 561 = 8976
Step 17: 8976 + 561 = 9537
Step 18: 9537 + 561 = 10098
Step 19: 10098 + 561 = 10659
Step 20: 10659 + 561 = 11220
Step 21: 11220 + 561 = 11781
Step 22: 11781 + 561 = 12342
Step 23: 12342 + 561 = 12903
Step 24: 12903 + 561 = 13464
Step 25: 13464 + 561 = 14025
Step 26: 14025 + 561 = 14586
Step 27: 14586 + 561 = 15147
Step 28: 15147 + 561 = 15708

So, 561*28 = 15708