Sure thing! We've got 602 and we're gonna multiply it by 25. That's the same as adding 602 to itself 25 times.
Step 1: 0 + 602 = 602
Step 2: 602 + 602 = 1204
Step 3: 1204 + 602 = 1806
Step 4: 1806 + 602 = 2408
Step 5: 2408 + 602 = 3010
Step 6: 3010 + 602 = 3612
Step 7: 3612 + 602 = 4214
Step 8: 4214 + 602 = 4816
Step 9: 4816 + 602 = 5418
Step 10: 5418 + 602 = 6020
Step 11: 6020 + 602 = 6622
Step 12: 6622 + 602 = 7224
Step 13: 7224 + 602 = 7826
Step 14: 7826 + 602 = 8428
Step 15: 8428 + 602 = 9030
Step 16: 9030 + 602 = 9632
Step 17: 9632 + 602 = 10234
Step 18: 10234 + 602 = 10836
Step 19: 10836 + 602 = 11438
Step 20: 11438 + 602 = 12040
Step 21: 12040 + 602 = 12642
Step 22: 12642 + 602 = 13244
Step 23: 13244 + 602 = 13846
Step 24: 13846 + 602 = 14448
Step 25: 14448 + 602 = 15050

So, 602*25 = 15050