A rectangular vegetable field is 40 meters long and 20 meters wide. If its length and width are increased by 10 meters each, and the harvest of cabbage per square meter is 35 kilograms, how many kilograms of cabbage will be collected after the expansion?
一个长方形菜地长40米，宽20米，如果它的长和宽各增加10米，每平方米收白菜35千克，扩建后比原来多收白菜多少千克？
<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<gadget id="calculator">1_500 - 800</gadget>
<output>700</output>

<gadget id="calculator">700 * 35</gadget>
<output>24_500</output>

<result>24_500</result>