The grain store ships 2 tons of flour, sells (1/5) the first day, and sells (1/2) the second day, how many tons are sold in total in the two days?
粮店运来2吨面粉，第一天卖出(1/5)，第二天卖出(1/2)吨，两天一共卖出多少吨．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 * (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/5) + (1/2)</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>