After a pile of bricks is used (3/10), another 510 bricks are added. At this time, the total number of bricks is more (1/8) than the original number of bricks when they were not used. How many bricks are there in this pile of bricks?
一堆砖用去它的(3/10)后，又增加了510块，这时砖的总块数比原来没有用时的砖数多(1/8)，这堆砖原有多少块砖？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + (1/8)</gadget>
<output>9/8 = around 1.125</output>

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

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(9/8) - (7/10)</gadget>
<output>17/40 = around 0.425</output>

<gadget id="calculator">510 / (17/40)</gadget>
<output>1_200</output>

<result>1_200</result>