Without delay, let's solve this. We've got 303 and we will be multiplying it by 6, that is, adding 303 to itself 6 times.
Step 1: 0 + 303 = 303
Step 2: 303 + 303 = 606
Step 3: 606 + 303 = 909
Step 4: 909 + 303 = 1212
Step 5: 1212 + 303 = 1515
Step 6: 1515 + 303 = 1818

So, 303*6 = 1818