Let's roll up our sleeves and solve this. We have 247 and we're going to multiply it by 20, essentially adding 247 to itself 20 times.
Step 1: 0 + 247 = 247
Step 2: 247 + 247 = 494
Step 3: 494 + 247 = 741
Step 4: 741 + 247 = 988
Step 5: 988 + 247 = 1235
Step 6: 1235 + 247 = 1482
Step 7: 1482 + 247 = 1729
Step 8: 1729 + 247 = 1976
Step 9: 1976 + 247 = 2223
Step 10: 2223 + 247 = 2470
Step 11: 2470 + 247 = 2717
Step 12: 2717 + 247 = 2964
Step 13: 2964 + 247 = 3211
Step 14: 3211 + 247 = 3458
Step 15: 3458 + 247 = 3705
Step 16: 3705 + 247 = 3952
Step 17: 3952 + 247 = 4199
Step 18: 4199 + 247 = 4446
Step 19: 4446 + 247 = 4693
Step 20: 4693 + 247 = 4940

So, 247*20 = 4940