OK, let's crack this. We're given 707 and our task is to multiply it by 39. Essentially, we'll be adding 707 to itself 39 times.
Step 1: 0 + 707 = 707
Step 2: 707 + 707 = 1414
Step 3: 1414 + 707 = 2121
Step 4: 2121 + 707 = 2828
Step 5: 2828 + 707 = 3535
Step 6: 3535 + 707 = 4242
Step 7: 4242 + 707 = 4949
Step 8: 4949 + 707 = 5656
Step 9: 5656 + 707 = 6363
Step 10: 6363 + 707 = 7070
Step 11: 7070 + 707 = 7777
Step 12: 7777 + 707 = 8484
Step 13: 8484 + 707 = 9191
Step 14: 9191 + 707 = 9898
Step 15: 9898 + 707 = 10605
Step 16: 10605 + 707 = 11312
Step 17: 11312 + 707 = 12019
Step 18: 12019 + 707 = 12726
Step 19: 12726 + 707 = 13433
Step 20: 13433 + 707 = 14140
Step 21: 14140 + 707 = 14847
Step 22: 14847 + 707 = 15554
Step 23: 15554 + 707 = 16261
Step 24: 16261 + 707 = 16968
Step 25: 16968 + 707 = 17675
Step 26: 17675 + 707 = 18382
Step 27: 18382 + 707 = 19089
Step 28: 19089 + 707 = 19796
Step 29: 19796 + 707 = 20503
Step 30: 20503 + 707 = 21210
Step 31: 21210 + 707 = 21917
Step 32: 21917 + 707 = 22624
Step 33: 22624 + 707 = 23331
Step 34: 23331 + 707 = 24038
Step 35: 24038 + 707 = 24745
Step 36: 24745 + 707 = 25452
Step 37: 25452 + 707 = 26159
Step 38: 26159 + 707 = 26866
Step 39: 26866 + 707 = 27573

So, 707*39 = 27573