Without delay, let's solve this. We've got 74 and we will be multiplying it by 21, that is, adding 74 to itself 21 times.
Step 1: 0 + 74 = 74
Step 2: 74 + 74 = 148
Step 3: 148 + 74 = 222
Step 4: 222 + 74 = 296
Step 5: 296 + 74 = 370
Step 6: 370 + 74 = 444
Step 7: 444 + 74 = 518
Step 8: 518 + 74 = 592
Step 9: 592 + 74 = 666
Step 10: 666 + 74 = 740
Step 11: 740 + 74 = 814
Step 12: 814 + 74 = 888
Step 13: 888 + 74 = 962
Step 14: 962 + 74 = 1036
Step 15: 1036 + 74 = 1110
Step 16: 1110 + 74 = 1184
Step 17: 1184 + 74 = 1258
Step 18: 1258 + 74 = 1332
Step 19: 1332 + 74 = 1406
Step 20: 1406 + 74 = 1480
Step 21: 1480 + 74 = 1554

So, 74*21 = 1554