Students from Yuying Primary School participated in the "Little Environmental Protection Guardian" activity. The fifth grade students cleared and transported (3/5) tons of garbage, which was (1/5) more tons than the fourth grade students. How many tons of garbage did the fourth and fifth grades collect?
育英小学的同学们参加"环保小卫士"活动．五年级同学清运垃圾(3/5)吨，比四年级同学多清运(1/5)吨．四、五年级共清运垃圾多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

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

<result>1</result>