A garbage treatment plant processes (2/5) tons of garbage on the first day, and (1/6) tons less on the second day than on the first day. How many tons of garbage are processed in total in these two days?
一个垃圾处理厂第一天处理垃圾(2/5)吨，第二天比第一天少处理(1/6)吨，这两天一共处理垃圾多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(2/5) - (1/6)</gadget>
<output>7/30 = around 0.233333</output>

<gadget id="calculator">(2/5) + (7/30)</gadget>
<output>19/30 = around 0.633333</output>

<result>19/30 = around 0.633333</result>