Xinhua Bookstore shipped 6,300 books, sold on the first day (1/3), sold on the second day (4/9), how many more books were sold on the second day than on the first day?
新华书店运来6300本书，第一天售出(1/3)，第二天售出(4/9)，第二天比第一天多卖出多少本？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(4/9) - (1/3)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">6_300 * (1/9)</gadget>
<output>700</output>

<result>700</result>