{"id":"R-021","problem":"Convert exactly one inch to millimetres.","reference":"1 × 25.4 mm","expected":25.4,"unit":"mm","tolerance":0.01,"split":"holdout"}
{"id":"R-022","problem":"Convert 2.5 metres to centimetres.","reference":"2.5 × 100 cm","expected":250,"unit":"cm","tolerance":0,"split":"train"}
{"id":"R-023","problem":"A 3 by 4 metre rectangle has what area?","reference":"3 m × 4 m","expected":12,"unit":"m²","tolerance":0,"split":"validation"}