A small grain store used to store 50 bags of rice, but now it sells 7 bags and brings in 2 bags every day. How many days will it take before all the rice in the grain store is sold out?
一家小粮店原来存有大米50袋，现在平均每天卖出7袋运进2袋，多少天以后粮店里的大米全部卖完？
<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<result>10</result>