group of ants moved. There was a pile of food stored in the anthole. Half of the food was transported out for the first time, and the remaining half was 80 grams less. At that time, there were 250 grams of food left in the anthole. How many grams of food were there originally in the anthole?
一群蚂蚁搬家，蚁洞内原存放一堆食物，第一次运出一半少80克，第二次运出剩下的一半多50克，第三次运出再剩下的一半多20克，这时蚁洞里还剩250克食物．问蚁洞内原来有多少克食物？
<gadget id="calculator">250 + 20</gadget>
<output>270</output>

<gadget id="calculator">270 * 2</gadget>
<output>540</output>

<gadget id="calculator">540 + 50</gadget>
<output>590</output>

<gadget id="calculator">590 * 2</gadget>
<output>1_180</output>

<gadget id="calculator">1_180 - 80</gadget>
<output>1_100</output>

<gadget id="calculator">1_100 * 2</gadget>
<output>2_200</output>

<result>2_200</result>