Sure thing! We've got 313 and we're gonna multiply it by 28. That's the same as adding 313 to itself 28 times.
Step 1: 0 + 313 = 313
Step 2: 313 + 313 = 626
Step 3: 626 + 313 = 939
Step 4: 939 + 313 = 1252
Step 5: 1252 + 313 = 1565
Step 6: 1565 + 313 = 1878
Step 7: 1878 + 313 = 2191
Step 8: 2191 + 313 = 2504
Step 9: 2504 + 313 = 2817
Step 10: 2817 + 313 = 3130
Step 11: 3130 + 313 = 3443
Step 12: 3443 + 313 = 3756
Step 13: 3756 + 313 = 4069
Step 14: 4069 + 313 = 4382
Step 15: 4382 + 313 = 4695
Step 16: 4695 + 313 = 5008
Step 17: 5008 + 313 = 5321
Step 18: 5321 + 313 = 5634
Step 19: 5634 + 313 = 5947
Step 20: 5947 + 313 = 6260
Step 21: 6260 + 313 = 6573
Step 22: 6573 + 313 = 6886
Step 23: 6886 + 313 = 7199
Step 24: 7199 + 313 = 7512
Step 25: 7512 + 313 = 7825
Step 26: 7825 + 313 = 8138
Step 27: 8138 + 313 = 8451
Step 28: 8451 + 313 = 8764

So, 313*28 = 8764