There is a batch of materials to be printed, A alone takes 10 hours to print, and B alone takes 12 hours, when A and B print at the same time, due to mutual interference, the two of them print 30 pages less per hour, and now they print at the same time It took 6 hours to type, so how many pages are there in total for this batch of materials?
有一批资料要打印，甲单独打要10小时，乙单独打要12小时，当甲、乙两人同时打印，由于相互有些干扰，每小时两人共少打30页，现在两人同时打用了6小时打完，那么这批资料一共有多少页？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/12) - (1/6)</gadget>
<output>-1/12 = around -0.083333</output>

<gadget id="calculator">(1/10) + (-1/12)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">30 / (1/60)</gadget>
<output>1_800</output>

<result>1_800</result>