A grain store sells rice (4/5) tons, flour (2/5) tons, and miscellaneous grains (1/5) ton in a week. The grain store sells a total of grains in this week How many tons?
一家粮店在一个星期内卖出大米(4/5)吨，卖出面粉(2/5)吨，卖出杂粮(1/5)吨，这家粮店在这一星期里一共卖出粮食多少吨？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(4/5) + (2/5) + (1/5)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>