The ratio of the store's sales in June to July is 5:6, and the sales in July are 30 million yuan. How much is the sales in June?
商店六月份与七月份销售额的比是5：6，七月份销售3000万元．六月份销售多少万元？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3_000 * (5/6)</gadget>
<output>2_500</output>

<result>2_500</result>