Alright, let's solve this math problem step by step. First, we have the number 307. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 10. So, we're going to take the number 307 and add it to itself 10 times.
Step 1: 0 + 307 = 307
Step 2: 307 + 307 = 614
Step 3: 614 + 307 = 921
Step 4: 921 + 307 = 1228
Step 5: 1228 + 307 = 1535
Step 6: 1535 + 307 = 1842
Step 7: 1842 + 307 = 2149
Step 8: 2149 + 307 = 2456
Step 9: 2456 + 307 = 2763
Step 10: 2763 + 307 = 3070

So, 307*10 = 3070