The canteen bought (4/5) tons of rice, ate (1/3) of it in the first week, and ate (1/5) tons in the second week. How many tons did they eat in two weeks?
食堂买回(4/5)吨大米，第一周吃了它的(1/3)，第二周又吃了(1/5)吨，两周一共吃了多少吨？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * (1/3)</gadget>
<output>4/15 = around 0.266667</output>

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

<gadget id="calculator">(4/15) + (1/5)</gadget>
<output>7/15 = around 0.466667</output>

<result>7/15 = around 0.466667</result>