truck transported chemical fertilizers. On the first day, it transported 8.8 tons in the morning, 2.1 tons more in the afternoon than in the morning, and 0.5 tons more in the second day than in the first day. At this time, all of them have been shipped. How many tons is this batch of fertilizer?
一辆卡车运化肥，第一天上午运了8.8吨，下午比上午多运了2.1吨，第二天比第一天多运了0.5吨，此时已全部运完．这批化肥有多少吨？
<gadget id="calculator">8.8 + 2.1</gadget>
<output>10.9</output>

<gadget id="calculator">8.8 + 10.9</gadget>
<output>19.7</output>

<gadget id="calculator">19.9 + 0.5 + 19.7</gadget>
<output>40.1</output>

<result>40.1</result>