Let's get this math done. We have 779 and we're going to multiply it by 17. This is the same as taking 779 and adding it to itself 17 times.
Step 1: 0 + 779 = 779
Step 2: 779 + 779 = 1558
Step 3: 1558 + 779 = 2337
Step 4: 2337 + 779 = 3116
Step 5: 3116 + 779 = 3895
Step 6: 3895 + 779 = 4674
Step 7: 4674 + 779 = 5453
Step 8: 5453 + 779 = 6232
Step 9: 6232 + 779 = 7011
Step 10: 7011 + 779 = 7790
Step 11: 7790 + 779 = 8569
Step 12: 8569 + 779 = 9348
Step 13: 9348 + 779 = 10127
Step 14: 10127 + 779 = 10906
Step 15: 10906 + 779 = 11685
Step 16: 11685 + 779 = 12464
Step 17: 12464 + 779 = 13243

So, 779*17 = 13243