Zhenxing Grain Store shipped 1 (5/6) tons of flour, sold (1/3) of the total on the first day, and sold (2/5) of the total on the second day, what fraction of the total is left?
振兴粮店运来1(5/6)吨面粉，第一天卖了总数的(1/3)，第二天卖了总数的(2/5)，还剩总数的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>