After using (3/10) of a pile of bricks, another 340 bricks are added. At this time, the total number of bricks is (9/8) of the original number of unused bricks. How many bricks are there in this pile?
一堆砖，用去它的(3/10)后，又增加了340块，这时砖的总块数是原来没有用时的块数的(9/8)．这堆砖原有多少块？
<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">(9/8) - 1</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(1/8) + (3/10)</gadget>
<output>17/40 = around 0.425</output>

<gadget id="calculator">340 / (17/40)</gadget>
<output>800</output>

<result>800</result>