There is a pile of rubbish at the construction site that is transported away twice, each transporting 15 tons, the second transporting tons is 1.2 times the first time. How many tons is this pile of garbage?
建筑工地有一堆垃圾分两次运走，每一次运15吨，第二次运的吨数是第一次的1.2倍．这堆垃圾有多少吨？
<gadget id="calculator">15 * 1.2</gadget>
<output>18</output>

<gadget id="calculator">18 + 15</gadget>
<output>33</output>

<result>33</result>