There are 80 large and small wine barrels. Each large barrel can hold 25 kilograms of wine, and each small barrel can hold 15 kilograms of wine. The large barrel can hold 800 kilograms more than the small barrel. Then, how many more large barrels than small barrels?
现有大小酒桶80个，大桶每个可装酒25千克，每个小桶可装酒15千克，大桶比小桶多装了800千克，那么，大酒桶比小酒桶多多少个．
<gadget id="calculator">80 * 15</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 + 800</gadget>
<output>2_000</output>

<gadget id="calculator">25 + 15</gadget>
<output>40</output>

<gadget id="calculator">2_000 / 40</gadget>
<output>50</output>

<gadget id="calculator">50 - 30</gadget>
<output>20</output>

<result>20</result>