The supermarket shipped 42 boxes of bananas, each weighing 51 kilograms, and 42 boxes of peaches, each weighing 49 kilograms. How many kilograms are the bananas and peaches together?
超市运来42箱香蕉，每箱51千克，42箱桃子，每箱49千克．香蕉和桃子一共多少千克？
<gadget id="calculator">51 * 42</gadget>
<output>2_142</output>

<gadget id="calculator">49 * 42</gadget>
<output>2_058</output>

<gadget id="calculator">2_142 + 2_058</gadget>
<output>4_200</output>

<result>4_200</result>