Without delay, let's solve this. We've got 149 and we will be multiplying it by 43, that is, adding 149 to itself 43 times.
Step 1: 0 + 149 = 149
Step 2: 149 + 149 = 298
Step 3: 298 + 149 = 447
Step 4: 447 + 149 = 596
Step 5: 596 + 149 = 745
Step 6: 745 + 149 = 894
Step 7: 894 + 149 = 1043
Step 8: 1043 + 149 = 1192
Step 9: 1192 + 149 = 1341
Step 10: 1341 + 149 = 1490
Step 11: 1490 + 149 = 1639
Step 12: 1639 + 149 = 1788
Step 13: 1788 + 149 = 1937
Step 14: 1937 + 149 = 2086
Step 15: 2086 + 149 = 2235
Step 16: 2235 + 149 = 2384
Step 17: 2384 + 149 = 2533
Step 18: 2533 + 149 = 2682
Step 19: 2682 + 149 = 2831
Step 20: 2831 + 149 = 2980
Step 21: 2980 + 149 = 3129
Step 22: 3129 + 149 = 3278
Step 23: 3278 + 149 = 3427
Step 24: 3427 + 149 = 3576
Step 25: 3576 + 149 = 3725
Step 26: 3725 + 149 = 3874
Step 27: 3874 + 149 = 4023
Step 28: 4023 + 149 = 4172
Step 29: 4172 + 149 = 4321
Step 30: 4321 + 149 = 4470
Step 31: 4470 + 149 = 4619
Step 32: 4619 + 149 = 4768
Step 33: 4768 + 149 = 4917
Step 34: 4917 + 149 = 5066
Step 35: 5066 + 149 = 5215
Step 36: 5215 + 149 = 5364
Step 37: 5364 + 149 = 5513
Step 38: 5513 + 149 = 5662
Step 39: 5662 + 149 = 5811
Step 40: 5811 + 149 = 5960
Step 41: 5960 + 149 = 6109
Step 42: 6109 + 149 = 6258
Step 43: 6258 + 149 = 6407

So, 149*43 = 6407