A batch of goods, shipped in three days. 18 tons were shipped on the first day, 20% of the total was shipped on the second day, and the ratio of the third day to the first day was 5:4. How many tons are there in total?
一批货物，三天运完．第一天运出18吨，第二天运出总数的20%，第三天运的与第一天的比是5：4，这批货物一共有多少吨？
<gadget id="calculator">18 + 22.5</gadget>
<output>40.5</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">40.5 / (4/5)</gadget>
<output>50.625</output>

<result>50.625</result>