The first class of four years collected 27.3 kg of waste paper, which was 4.6 kg less than that of the second class of four years. How many kg were collected by the two classes?
四年一班收集废纸27.3千克，比四年二班少收集4.6千克，两个班一共收集多少千克？
<gadget id="calculator">27.3 + 4.6</gadget>
<output>31.9</output>

<gadget id="calculator">27.3 + 31.9</gadget>
<output>59.2</output>

<result>59.2</result>