A batch of parts can be completed in 6 days by A alone, 9 days by B alone, and 260 parts left after 2 days of joint work. How many parts are there in this batch?
一批零件，甲单独做6天完成，乙单独做9天完成，两人合做2天后，还剩下260个零件．这批零件有多少个？
<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">1 - (8/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">260 / (1/9)</gadget>
<output>2_340</output>

<result>2_340</result>