Let's roll up our sleeves and solve this. We have 351 and we're going to multiply it by 22, essentially adding 351 to itself 22 times.
Step 1: 0 + 351 = 351
Step 2: 351 + 351 = 702
Step 3: 702 + 351 = 1053
Step 4: 1053 + 351 = 1404
Step 5: 1404 + 351 = 1755
Step 6: 1755 + 351 = 2106
Step 7: 2106 + 351 = 2457
Step 8: 2457 + 351 = 2808
Step 9: 2808 + 351 = 3159
Step 10: 3159 + 351 = 3510
Step 11: 3510 + 351 = 3861
Step 12: 3861 + 351 = 4212
Step 13: 4212 + 351 = 4563
Step 14: 4563 + 351 = 4914
Step 15: 4914 + 351 = 5265
Step 16: 5265 + 351 = 5616
Step 17: 5616 + 351 = 5967
Step 18: 5967 + 351 = 6318
Step 19: 6318 + 351 = 6669
Step 20: 6669 + 351 = 7020
Step 21: 7020 + 351 = 7371
Step 22: 7371 + 351 = 7722

So, 351*22 = 7722