A pile of sand is transported from the construction site, (2/6) tons are used for road construction, (1/6) tons are used for building walls, and (5/6) tons are left, the remaining sand is more than the used sand How many tons?
建筑工地运来一堆沙子，修路用去(2/6)吨，砌墙用去(1/6)吨，还剩下(5/6)吨，剩下的沙子比用去的沙子多多少吨？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/3) + (1/6)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/6) - (1/2)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>