{"id":"percentage-calculator","engine":"core","category":"math","name":"คำนวณเปอร์เซ็นต์","fields":[{"key":"value","label":"ค่า","type":"number","default":250,"required":true},{"key":"percent","label":"เปอร์เซ็นต์ (%)","type":"number","default":15,"required":true}],"sample":{"value":250,"percent":15}}