Sure thing! We've got 835 and we're gonna multiply it by 24. That's the same as adding 835 to itself 24 times.
Step 1: 0 + 835 = 835
Step 2: 835 + 835 = 1670
Step 3: 1670 + 835 = 2505
Step 4: 2505 + 835 = 3340
Step 5: 3340 + 835 = 4175
Step 6: 4175 + 835 = 5010
Step 7: 5010 + 835 = 5845
Step 8: 5845 + 835 = 6680
Step 9: 6680 + 835 = 7515
Step 10: 7515 + 835 = 8350
Step 11: 8350 + 835 = 9185
Step 12: 9185 + 835 = 10020
Step 13: 10020 + 835 = 10855
Step 14: 10855 + 835 = 11690
Step 15: 11690 + 835 = 12525
Step 16: 12525 + 835 = 13360
Step 17: 13360 + 835 = 14195
Step 18: 14195 + 835 = 15030
Step 19: 15030 + 835 = 15865
Step 20: 15865 + 835 = 16700
Step 21: 16700 + 835 = 17535
Step 22: 17535 + 835 = 18370
Step 23: 18370 + 835 = 19205
Step 24: 19205 + 835 = 20040

So, 835*24 = 20040