OK, let's crack this. We're given 735 and our task is to multiply it by 49. Essentially, we'll be adding 735 to itself 49 times.
Step 1: 0 + 735 = 735
Step 2: 735 + 735 = 1470
Step 3: 1470 + 735 = 2205
Step 4: 2205 + 735 = 2940
Step 5: 2940 + 735 = 3675
Step 6: 3675 + 735 = 4410
Step 7: 4410 + 735 = 5145
Step 8: 5145 + 735 = 5880
Step 9: 5880 + 735 = 6615
Step 10: 6615 + 735 = 7350
Step 11: 7350 + 735 = 8085
Step 12: 8085 + 735 = 8820
Step 13: 8820 + 735 = 9555
Step 14: 9555 + 735 = 10290
Step 15: 10290 + 735 = 11025
Step 16: 11025 + 735 = 11760
Step 17: 11760 + 735 = 12495
Step 18: 12495 + 735 = 13230
Step 19: 13230 + 735 = 13965
Step 20: 13965 + 735 = 14700
Step 21: 14700 + 735 = 15435
Step 22: 15435 + 735 = 16170
Step 23: 16170 + 735 = 16905
Step 24: 16905 + 735 = 17640
Step 25: 17640 + 735 = 18375
Step 26: 18375 + 735 = 19110
Step 27: 19110 + 735 = 19845
Step 28: 19845 + 735 = 20580
Step 29: 20580 + 735 = 21315
Step 30: 21315 + 735 = 22050
Step 31: 22050 + 735 = 22785
Step 32: 22785 + 735 = 23520
Step 33: 23520 + 735 = 24255
Step 34: 24255 + 735 = 24990
Step 35: 24990 + 735 = 25725
Step 36: 25725 + 735 = 26460
Step 37: 26460 + 735 = 27195
Step 38: 27195 + 735 = 27930
Step 39: 27930 + 735 = 28665
Step 40: 28665 + 735 = 29400
Step 41: 29400 + 735 = 30135
Step 42: 30135 + 735 = 30870
Step 43: 30870 + 735 = 31605
Step 44: 31605 + 735 = 32340
Step 45: 32340 + 735 = 33075
Step 46: 33075 + 735 = 33810
Step 47: 33810 + 735 = 34545
Step 48: 34545 + 735 = 35280
Step 49: 35280 + 735 = 36015

So, 735*49 = 36015