Some rice was shipped from the canteen, (1/4) ton was used in the first week, (1/5) ton was used in the second week, and (5/8) ton was left. How many tons are these rice in total?
食堂运来一些大米，第一周用去(1/4)吨，第二周用去(1/5)吨，还剩下(5/8)吨，这些大米一共多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(1/4) + (1/5) + (5/8)</gadget>
<output>43/40 = around 1.075</output>

<result>43/40 = around 1.075</result>