Students participate in environmental protection activities. The fifth grade clears and transports (3/4) tons of garbage, which is less than the sixth grade (1/8) tons. How many tons of garbage did the fifth and sixth grades collect?
学生参加环保行动．五年级清运垃圾(3/4)吨，比六年级少清运(1/8)吨．五六年级共清运垃圾多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(3/4) + (1/8) + (3/4)</gadget>
<output>13/8 = around 1.625</output>

<result>13/8 = around 1.625</result>