The grain store originally had (1/2) ton of rice, sold (1/3) ton and then shipped in (1/4) ton, how many tons of rice does the grain store have now?
粮店原来有(1/2)吨大米，卖出(1/3)吨后又运进(1/4)吨，粮店现在有大米多少吨？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">(1/6) + (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>