Use a truck to transport sand. The first day transported 20.3 tons, the second day was 2.8 tons more than the first day, and the third day was 0.6 tons less than the second day. How many tons were transported on the third day?
用一辆卡车运沙子，第一天运了20.3吨，第二天比第一天多运2.8吨，第三天比第二天少运0.6吨，第三天运了多少吨？
<gadget id="calculator">20.3 + 2.8</gadget>
<output>23.1</output>

<gadget id="calculator">23.1 - 0.6</gadget>
<output>22.5</output>

<result>22.5</result>