The love convoy delivered a batch of relief materials to the earthquake-stricken area in Yushu, Qinghai. On the first day, (1/5) of the materials were transported away, and on the second day, 10 tons more than twice as much as the first day were transported, leaving 8 tons left If there is no shipment, how many tons are there in this batch of disaster relief supplies?
爱心车队向青海玉树地震灾区运送一批救灾物资，第一天运走了这批物资的(1/5)，第二天运的比第一天的2倍还多10吨，还剩8吨没有运，这批救灾物资有多少吨．
<gadget id="calculator">10 + 8</gadget>
<output>18</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/5) - (2/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">18 / (2/5)</gadget>
<output>45</output>

<result>45</result>