For a batch of chemical fertilizers, (1/3) is removed on the first day, and (2/5) is removed on the second day, how much of this batch of fertilizers are removed in total.
一批化肥，第一天运走它的(1/3)，第二天运走它的(2/5)，共运走这批化肥的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<result>11/15 = around 0.733333</result>