OK, let's crack this. We're given 986 and our task is to multiply it by 39. Essentially, we'll be adding 986 to itself 39 times.
Step 1: 0 + 986 = 986
Step 2: 986 + 986 = 1972
Step 3: 1972 + 986 = 2958
Step 4: 2958 + 986 = 3944
Step 5: 3944 + 986 = 4930
Step 6: 4930 + 986 = 5916
Step 7: 5916 + 986 = 6902
Step 8: 6902 + 986 = 7888
Step 9: 7888 + 986 = 8874
Step 10: 8874 + 986 = 9860
Step 11: 9860 + 986 = 10846
Step 12: 10846 + 986 = 11832
Step 13: 11832 + 986 = 12818
Step 14: 12818 + 986 = 13804
Step 15: 13804 + 986 = 14790
Step 16: 14790 + 986 = 15776
Step 17: 15776 + 986 = 16762
Step 18: 16762 + 986 = 17748
Step 19: 17748 + 986 = 18734
Step 20: 18734 + 986 = 19720
Step 21: 19720 + 986 = 20706
Step 22: 20706 + 986 = 21692
Step 23: 21692 + 986 = 22678
Step 24: 22678 + 986 = 23664
Step 25: 23664 + 986 = 24650
Step 26: 24650 + 986 = 25636
Step 27: 25636 + 986 = 26622
Step 28: 26622 + 986 = 27608
Step 29: 27608 + 986 = 28594
Step 30: 28594 + 986 = 29580
Step 31: 29580 + 986 = 30566
Step 32: 30566 + 986 = 31552
Step 33: 31552 + 986 = 32538
Step 34: 32538 + 986 = 33524
Step 35: 33524 + 986 = 34510
Step 36: 34510 + 986 = 35496
Step 37: 35496 + 986 = 36482
Step 38: 36482 + 986 = 37468
Step 39: 37468 + 986 = 38454

So, 986*39 = 38454