Without delay, let's solve this. We've got 141 and we will be multiplying it by 30, that is, adding 141 to itself 30 times.
Step 1: 0 + 141 = 141
Step 2: 141 + 141 = 282
Step 3: 282 + 141 = 423
Step 4: 423 + 141 = 564
Step 5: 564 + 141 = 705
Step 6: 705 + 141 = 846
Step 7: 846 + 141 = 987
Step 8: 987 + 141 = 1128
Step 9: 1128 + 141 = 1269
Step 10: 1269 + 141 = 1410
Step 11: 1410 + 141 = 1551
Step 12: 1551 + 141 = 1692
Step 13: 1692 + 141 = 1833
Step 14: 1833 + 141 = 1974
Step 15: 1974 + 141 = 2115
Step 16: 2115 + 141 = 2256
Step 17: 2256 + 141 = 2397
Step 18: 2397 + 141 = 2538
Step 19: 2538 + 141 = 2679
Step 20: 2679 + 141 = 2820
Step 21: 2820 + 141 = 2961
Step 22: 2961 + 141 = 3102
Step 23: 3102 + 141 = 3243
Step 24: 3243 + 141 = 3384
Step 25: 3384 + 141 = 3525
Step 26: 3525 + 141 = 3666
Step 27: 3666 + 141 = 3807
Step 28: 3807 + 141 = 3948
Step 29: 3948 + 141 = 4089
Step 30: 4089 + 141 = 4230

So, 141*30 = 4230