Two sewing units work together to process the same garment. The first group uses 307.5 meters of cloth, and the second group uses 317.5 meters of cloth. As a result, the second group processes 4 more sets of clothing than the first group. How many meters of cloth is used for each suit?
两个缝纫机组共同加工同一种服装，第一组用布307.5米，第二组用布317.5米，结果第二组比第一组多加工4套服装．每套服装用布多少米？
<gadget id="calculator">317.5 - 307.5</gadget>
<output>10</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>