The Aiper Horizon U1 robot lawn mower has been revealed and is expected to launch later this year. As with other newer models, the robot does not require a physical boundary wire; instead, it uses RTK and INS to navigate your lawn. Other features include RGB cameras, ToF sensors and app-based controls.https://www.notebookcheck.net/Aiper-announces-new-wireless-Horizon-U1-robot-lawn-mower.793275.0.html
I believe you have a typo....32,200 sq. yards is .74 acres