Alright, let's solve this math problem step by step. First, we have the number 899. 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 899 and add it to itself 10 times.
Step 1: 0 + 899 = 899
Step 2: 899 + 899 = 1798
Step 3: 1798 + 899 = 2697
Step 4: 2697 + 899 = 3596
Step 5: 3596 + 899 = 4495
Step 6: 4495 + 899 = 5394
Step 7: 5394 + 899 = 6293
Step 8: 6293 + 899 = 7192
Step 9: 7192 + 899 = 8091
Step 10: 8091 + 899 = 8990

So, 899*10 = 8990