Sure thing, let's get straight to it. We start with 442 and we're going to multiply it by 15, which means adding 442 to itself 15 times.
Step 1: 0 + 442 = 442
Step 2: 442 + 442 = 884
Step 3: 884 + 442 = 1326
Step 4: 1326 + 442 = 1768
Step 5: 1768 + 442 = 2210
Step 6: 2210 + 442 = 2652
Step 7: 2652 + 442 = 3094
Step 8: 3094 + 442 = 3536
Step 9: 3536 + 442 = 3978
Step 10: 3978 + 442 = 4420
Step 11: 4420 + 442 = 4862
Step 12: 4862 + 442 = 5304
Step 13: 5304 + 442 = 5746
Step 14: 5746 + 442 = 6188
Step 15: 6188 + 442 = 6630

So, 442*15 = 6630