Sure thing! We've got 805 and we're gonna multiply it by 39. That's the same as adding 805 to itself 39 times.
Step 1: 0 + 805 = 805
Step 2: 805 + 805 = 1610
Step 3: 1610 + 805 = 2415
Step 4: 2415 + 805 = 3220
Step 5: 3220 + 805 = 4025
Step 6: 4025 + 805 = 4830
Step 7: 4830 + 805 = 5635
Step 8: 5635 + 805 = 6440
Step 9: 6440 + 805 = 7245
Step 10: 7245 + 805 = 8050
Step 11: 8050 + 805 = 8855
Step 12: 8855 + 805 = 9660
Step 13: 9660 + 805 = 10465
Step 14: 10465 + 805 = 11270
Step 15: 11270 + 805 = 12075
Step 16: 12075 + 805 = 12880
Step 17: 12880 + 805 = 13685
Step 18: 13685 + 805 = 14490
Step 19: 14490 + 805 = 15295
Step 20: 15295 + 805 = 16100
Step 21: 16100 + 805 = 16905
Step 22: 16905 + 805 = 17710
Step 23: 17710 + 805 = 18515
Step 24: 18515 + 805 = 19320
Step 25: 19320 + 805 = 20125
Step 26: 20125 + 805 = 20930
Step 27: 20930 + 805 = 21735
Step 28: 21735 + 805 = 22540
Step 29: 22540 + 805 = 23345
Step 30: 23345 + 805 = 24150
Step 31: 24150 + 805 = 24955
Step 32: 24955 + 805 = 25760
Step 33: 25760 + 805 = 26565
Step 34: 26565 + 805 = 27370
Step 35: 27370 + 805 = 28175
Step 36: 28175 + 805 = 28980
Step 37: 28980 + 805 = 29785
Step 38: 29785 + 805 = 30590
Step 39: 30590 + 805 = 31395

So, 805*39 = 31395