Sure thing, let's get straight to it. We start with 24 and we're going to multiply it by 20, which means adding 24 to itself 20 times.
Step 1: 0 + 24 = 24
Step 2: 24 + 24 = 48
Step 3: 48 + 24 = 72
Step 4: 72 + 24 = 96
Step 5: 96 + 24 = 120
Step 6: 120 + 24 = 144
Step 7: 144 + 24 = 168
Step 8: 168 + 24 = 192
Step 9: 192 + 24 = 216
Step 10: 216 + 24 = 240
Step 11: 240 + 24 = 264
Step 12: 264 + 24 = 288
Step 13: 288 + 24 = 312
Step 14: 312 + 24 = 336
Step 15: 336 + 24 = 360
Step 16: 360 + 24 = 384
Step 17: 384 + 24 = 408
Step 18: 408 + 24 = 432
Step 19: 432 + 24 = 456
Step 20: 456 + 24 = 480

So, 24*20 = 480