OK, let's work through this together. We're starting with 304 and we're going to multiply it by 9, which means we add 304 to itself 9 times.
Step 1: 0 + 304 = 304
Step 2: 304 + 304 = 608
Step 3: 608 + 304 = 912
Step 4: 912 + 304 = 1216
Step 5: 1216 + 304 = 1520
Step 6: 1520 + 304 = 1824
Step 7: 1824 + 304 = 2128
Step 8: 2128 + 304 = 2432
Step 9: 2432 + 304 = 2736

So, 304*9 = 2736