According to 240+260=500, 500/25=20, 900-20=880, how much is a comprehensive formula.
根据240+260=500，500/25=20，900-20=880，组成一道综合算式是多少．
<gadget id="calculator">240 + 260</gadget>
<output>500</output>

<gadget id="calculator">500 / 25</gadget>
<output>20</output>

<gadget id="calculator">900 - 20</gadget>
<output>880</output>

<result>880</result>