Sure thing! We've got 259 and we're gonna multiply it by 20. That's the same as adding 259 to itself 20 times.
Step 1: 0 + 259 = 259
Step 2: 259 + 259 = 518
Step 3: 518 + 259 = 777
Step 4: 777 + 259 = 1036
Step 5: 1036 + 259 = 1295
Step 6: 1295 + 259 = 1554
Step 7: 1554 + 259 = 1813
Step 8: 1813 + 259 = 2072
Step 9: 2072 + 259 = 2331
Step 10: 2331 + 259 = 2590
Step 11: 2590 + 259 = 2849
Step 12: 2849 + 259 = 3108
Step 13: 3108 + 259 = 3367
Step 14: 3367 + 259 = 3626
Step 15: 3626 + 259 = 3885
Step 16: 3885 + 259 = 4144
Step 17: 4144 + 259 = 4403
Step 18: 4403 + 259 = 4662
Step 19: 4662 + 259 = 4921
Step 20: 4921 + 259 = 5180

So, 259*20 = 5180