I have 240,000 hours a day

After being reborn, I got a system that can exchange time, with 240,000 hours a day. Within an hour, I became a mathematics genius and slammed the class math. In five days, I was fluent in the nine subjects of the college entrance examination, casually 700+, shocked the teachers. Moreover, there is no talent in front of the system. Go genius boy? Give me two days to make you scumbag. Music master? Give me three days to get you back to school. And I feel tired of making money. So, I made my dad the richest man and my mom the queen of the entertainment industry. He lived a mediocre rich second-generation life.