There are two piles of rice, the first pile is 900 bags, when the first pile is sold (1/3) and the second pile is sold (1/4), the remaining rice in the first pile is twice as much as the second pile 120 more bags, how many bags of rice are there in the second pile?
有两堆稻谷，第一堆900袋，当第一堆卖出(1/3)，第二堆卖出(1/4)以后，剩下的稻谷第一堆比第二堆的2倍还多120袋，第二堆原来有稻谷多少袋？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">900 * (2/3)</gadget>
<output>600</output>

<gadget id="calculator">600 - 120</gadget>
<output>480</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">480 / 2 / (3/4)</gadget>
<output>320</output>

<result>320</result>