Sure thing! We've got 667 and we're gonna multiply it by 39. That's the same as adding 667 to itself 39 times.
Step 1: 0 + 667 = 667
Step 2: 667 + 667 = 1334
Step 3: 1334 + 667 = 2001
Step 4: 2001 + 667 = 2668
Step 5: 2668 + 667 = 3335
Step 6: 3335 + 667 = 4002
Step 7: 4002 + 667 = 4669
Step 8: 4669 + 667 = 5336
Step 9: 5336 + 667 = 6003
Step 10: 6003 + 667 = 6670
Step 11: 6670 + 667 = 7337
Step 12: 7337 + 667 = 8004
Step 13: 8004 + 667 = 8671
Step 14: 8671 + 667 = 9338
Step 15: 9338 + 667 = 10005
Step 16: 10005 + 667 = 10672
Step 17: 10672 + 667 = 11339
Step 18: 11339 + 667 = 12006
Step 19: 12006 + 667 = 12673
Step 20: 12673 + 667 = 13340
Step 21: 13340 + 667 = 14007
Step 22: 14007 + 667 = 14674
Step 23: 14674 + 667 = 15341
Step 24: 15341 + 667 = 16008
Step 25: 16008 + 667 = 16675
Step 26: 16675 + 667 = 17342
Step 27: 17342 + 667 = 18009
Step 28: 18009 + 667 = 18676
Step 29: 18676 + 667 = 19343
Step 30: 19343 + 667 = 20010
Step 31: 20010 + 667 = 20677
Step 32: 20677 + 667 = 21344
Step 33: 21344 + 667 = 22011
Step 34: 22011 + 667 = 22678
Step 35: 22678 + 667 = 23345
Step 36: 23345 + 667 = 24012
Step 37: 24012 + 667 = 24679
Step 38: 24679 + 667 = 25346
Step 39: 25346 + 667 = 26013

So, 667*39 = 26013