A pile of bricks is used (3/4), and another 600 bricks are brought in. At this time, the number of bricks is the original (2/3). How much did it cost?
一堆砖用去(3/4)，又运来600块，这时砖的块数是原来的(2/3)．用去多少块？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">600 / (5/12)</gadget>
<output>1_440</output>

<gadget id="calculator">1_440 * (3/4)</gadget>
<output>1_080</output>

<result>1_080</result>