We have a family tradition of having a GIANT hamburger as our birthday cake!!

Background: my daughter is nine years old and in her 3rd Grade of elementary school. She got 73 score (100 is the full) in recent Mathematics test. I agreed that this test is more difficult than before. Her teacher asked the parents to do error analysis together with the students at home...(Why this is the homework for parents??) Last night, I helped my daughter to do error analysis on her Mathematics test. Due to 73, so many errors need to be analyzed. At the beginning, she was so cooperated but she lost the patience gradually...here more than three thousands words are waived...finally, I got her. She said her goal on mathematics is getting 60 of 100 on the test ONLY, so she felt 73 was not so bad. She feels GOOD on 73. 60 is the qualified line of the elementary school tests in China. And she also told me her different SPECIFIC goals on different subjects. Suddenly, I didn't know what to say, there was about 5 mins blank time and neither of us said something. Then, I told her: Good, girl! I've never known that you have such a specific goal on the subjects. Keep it and mom will always support you and help you. Maybe you would like to see possible higher goals on someday in the future! I'm wondering: AM I RIGHT/GOOD/APPRORIATE to give this kinda reaction?