At the end of May this year, due to the blue-green algae outbreak in Taihu Lake, the water quality deteriorated, affecting the drinking and living water of Wuxi citizens, and the supply of purified water in local supermarkets was in short supply. Carrefour’s Shanghai headquarters mobilized 7,500 boxes of water overnight on the 29th to supply two stores in Wuxi. The number of boxes supplied to Poly Store was from Yongle Store (7/8). How many boxes of pure water did Carrefour’s Shanghai headquarters supply to Yongle Store?
今年五月底，因太湖爆发的蓝藻导致水质恶化，影响无锡市民的饮用和生活用水，当地超市的纯净水供应紧张．家乐福上海总部在29日连夜调集了7500箱水供应给无锡两家门店，供应给保利店的箱数是永乐店的(7/8)，家乐福上海总部供应给永乐店多少箱纯净水？
<gadget id="calculator">7 + 8</gadget>
<output>15</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">7_500 * (8/15)</gadget>
<output>4_000</output>

<result>4_000</result>