There are 1,000 bottles of mineral water in the supermarket. If 20 bottles are sold every day, how many bottles can be sold in July?
超市有1000瓶矿泉水，如果每天卖出20瓶，那七月份可以卖出多少瓶？
<gadget id="calculator">20 * 31</gadget>
<output>620</output>

<result>620</result>