OK, let's work through this together. We're starting with 498 and we're going to multiply it by 9, which means we add 498 to itself 9 times.
Step 1: 0 + 498 = 498
Step 2: 498 + 498 = 996
Step 3: 996 + 498 = 1494
Step 4: 1494 + 498 = 1992
Step 5: 1992 + 498 = 2490
Step 6: 2490 + 498 = 2988
Step 7: 2988 + 498 = 3486
Step 8: 3486 + 498 = 3984
Step 9: 3984 + 498 = 4482

So, 498*9 = 4482