Alright, let's solve this math problem step by step. First, we have the number 278. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 5. So, we're going to take the number 278 and add it to itself 5 times.
Step 1: 0 + 278 = 278
Step 2: 278 + 278 = 556
Step 3: 556 + 278 = 834
Step 4: 834 + 278 = 1112
Step 5: 1112 + 278 = 1390

So, 278*5 = 1390