Sure thing, let's get straight to it. We start with 46 and we're going to multiply it by 21, which means adding 46 to itself 21 times.
Step 1: 0 + 46 = 46
Step 2: 46 + 46 = 92
Step 3: 92 + 46 = 138
Step 4: 138 + 46 = 184
Step 5: 184 + 46 = 230
Step 6: 230 + 46 = 276
Step 7: 276 + 46 = 322
Step 8: 322 + 46 = 368
Step 9: 368 + 46 = 414
Step 10: 414 + 46 = 460
Step 11: 460 + 46 = 506
Step 12: 506 + 46 = 552
Step 13: 552 + 46 = 598
Step 14: 598 + 46 = 644
Step 15: 644 + 46 = 690
Step 16: 690 + 46 = 736
Step 17: 736 + 46 = 782
Step 18: 782 + 46 = 828
Step 19: 828 + 46 = 874
Step 20: 874 + 46 = 920
Step 21: 920 + 46 = 966

So, 46*21 = 966