The school spent 12,800 yuan on purchasing sports equipment this year, which is twice as much as last year and more than 800 yuan. How much did it cost last year? Column: how much.
学校添置体育器材，今年开支12800元，是去年的两倍还多800元，去年开支多少元？列式：多少．
<gadget id="calculator">12_800 - 800</gadget>
<output>12_000</output>

<gadget id="calculator">12_000 / 2</gadget>
<output>6_000</output>

<result>6_000</result>