The fruit store shipped 28 boxes of apples and 12 boxes of pears, and each box weighed 16 kilograms. How many kilograms of fruit did the fruit store ship in total?
水果店运来28箱苹果，12箱梨，每箱都重16千克，水果店共运来多少千克水果？
<gadget id="calculator">28 + 12</gadget>
<output>40</output>

<gadget id="calculator">16 * 40</gadget>
<output>640</output>

<result>640</result>