OK, let's crack this. We're given 268 and our task is to multiply it by 31. Essentially, we'll be adding 268 to itself 31 times.
Step 1: 0 + 268 = 268
Step 2: 268 + 268 = 536
Step 3: 536 + 268 = 804
Step 4: 804 + 268 = 1072
Step 5: 1072 + 268 = 1340
Step 6: 1340 + 268 = 1608
Step 7: 1608 + 268 = 1876
Step 8: 1876 + 268 = 2144
Step 9: 2144 + 268 = 2412
Step 10: 2412 + 268 = 2680
Step 11: 2680 + 268 = 2948
Step 12: 2948 + 268 = 3216
Step 13: 3216 + 268 = 3484
Step 14: 3484 + 268 = 3752
Step 15: 3752 + 268 = 4020
Step 16: 4020 + 268 = 4288
Step 17: 4288 + 268 = 4556
Step 18: 4556 + 268 = 4824
Step 19: 4824 + 268 = 5092
Step 20: 5092 + 268 = 5360
Step 21: 5360 + 268 = 5628
Step 22: 5628 + 268 = 5896
Step 23: 5896 + 268 = 6164
Step 24: 6164 + 268 = 6432
Step 25: 6432 + 268 = 6700
Step 26: 6700 + 268 = 6968
Step 27: 6968 + 268 = 7236
Step 28: 7236 + 268 = 7504
Step 29: 7504 + 268 = 7772
Step 30: 7772 + 268 = 8040
Step 31: 8040 + 268 = 8308

So, 268*31 = 8308