A store sells an average of 50 kilograms of apples per day. How many kilograms of apples are sold in total in May?
一家商店平均每天卖出50千克苹果，5月份一共卖出多少千克苹果．
<gadget id="calculator">50 * 31</gadget>
<output>1_550</output>

<result>1_550</result>