{"id":"proportion-calculator","engine":"core","category":"math","name":"Proportion berechnen","fields":[{"key":"a","label":"a","type":"number","default":3,"required":true},{"key":"b","label":"b","type":"number","default":5,"required":true},{"key":"c","label":"c","type":"number","default":12,"required":true}],"sample":{"a":3,"b":5,"c":12}}