Sure thing! We've got 802 and we're gonna multiply it by 25. That's the same as adding 802 to itself 25 times.
Step 1: 0 + 802 = 802
Step 2: 802 + 802 = 1604
Step 3: 1604 + 802 = 2406
Step 4: 2406 + 802 = 3208
Step 5: 3208 + 802 = 4010
Step 6: 4010 + 802 = 4812
Step 7: 4812 + 802 = 5614
Step 8: 5614 + 802 = 6416
Step 9: 6416 + 802 = 7218
Step 10: 7218 + 802 = 8020
Step 11: 8020 + 802 = 8822
Step 12: 8822 + 802 = 9624
Step 13: 9624 + 802 = 10426
Step 14: 10426 + 802 = 11228
Step 15: 11228 + 802 = 12030
Step 16: 12030 + 802 = 12832
Step 17: 12832 + 802 = 13634
Step 18: 13634 + 802 = 14436
Step 19: 14436 + 802 = 15238
Step 20: 15238 + 802 = 16040
Step 21: 16040 + 802 = 16842
Step 22: 16842 + 802 = 17644
Step 23: 17644 + 802 = 18446
Step 24: 18446 + 802 = 19248
Step 25: 19248 + 802 = 20050

So, 802*25 = 20050