A sports field is 250 meters long and 160 meters wide. When it is expanded, the length increases by 50 meters and the width increases by 40 meters. How many hectares does the expanded sports field increase compared to the original?
一个运动场长250米，宽160米，扩建时长增加了50米，宽增加了40米，扩建后的运动场比原来增加了多少公顷？
<gadget id="calculator">250 + 50</gadget>
<output>300</output>

<gadget id="calculator">160 + 40</gadget>
<output>200</output>

<gadget id="calculator">300 * 200</gadget>
<output>60_000</output>

<gadget id="calculator">250 * 160</gadget>
<output>40_000</output>

<gadget id="calculator">60_000 - 40_000</gadget>
<output>20_000</output>

<gadget id="calculator">20_000 / 10_000</gadget>
<output>2</output>

<result>2</result>