A pile of sand weighs 3 tons, (1/2) ton is used for the first time, and the remaining (2/3) is used for the second time, how many tons are left in the end?
一堆沙重3吨，第一次用去(1/2)吨，第二次用去剩下的(2/3)，最后剩下多少吨？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 - (1/2)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<gadget id="calculator">(5/2) * (1/3)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>