The fruit shop shipped 28 boxes of apples and 21 boxes of bananas. Each box of the two fruits weighs 16 kg. How many kilograms did the apples and bananas weigh together?
水果店运来苹果28箱，香蕉21箱．两种水果每箱都重16千克．运来的苹果和香蕉一共重多少千克？
<gadget id="calculator">16 * 28</gadget>
<output>448</output>

<gadget id="calculator">16 * 21</gadget>
<output>336</output>

<gadget id="calculator">448 + 336</gadget>
<output>784</output>

<result>784</result>