A bottle of instant coffee powder has a net weight of 600 grams, and each cup needs 16 grams of coffee powder and 9 grams of cube sugar. How many kilograms of cube sugar are needed to finish this bottle of coffee powder?
一瓶装速溶咖啡粉净重600克，每冲一杯需要16克咖啡粉和9克方糖，冲完这瓶咖啡粉最少需要方糖多少千克？
<result>0.3375</result>