The supermarket originally sold 348 kilograms of watermelons, sold 153 kilograms in the morning, and shipped another 213 kilograms in the afternoon. How many kilograms of watermelons are there in the supermarket?
超市原有西瓜348千克，上午卖出153千克，下午又运来213千克，这时超市有西瓜多少千克？
<gadget id="calculator">348 - 153</gadget>
<output>195</output>

<gadget id="calculator">195 + 213</gadget>
<output>408</output>

<result>408</result>