OK, let's crack this. We're given 235 and our task is to multiply it by 24. Essentially, we'll be adding 235 to itself 24 times.
Step 1: 0 + 235 = 235
Step 2: 235 + 235 = 470
Step 3: 470 + 235 = 705
Step 4: 705 + 235 = 940
Step 5: 940 + 235 = 1175
Step 6: 1175 + 235 = 1410
Step 7: 1410 + 235 = 1645
Step 8: 1645 + 235 = 1880
Step 9: 1880 + 235 = 2115
Step 10: 2115 + 235 = 2350
Step 11: 2350 + 235 = 2585
Step 12: 2585 + 235 = 2820
Step 13: 2820 + 235 = 3055
Step 14: 3055 + 235 = 3290
Step 15: 3290 + 235 = 3525
Step 16: 3525 + 235 = 3760
Step 17: 3760 + 235 = 3995
Step 18: 3995 + 235 = 4230
Step 19: 4230 + 235 = 4465
Step 20: 4465 + 235 = 4700
Step 21: 4700 + 235 = 4935
Step 22: 4935 + 235 = 5170
Step 23: 5170 + 235 = 5405
Step 24: 5405 + 235 = 5640

So, 235*24 = 5640