In the construction of new countryside, the district government supported a batch of cement for the construction of cement roads in Nancun. It can be transported by 25 large trucks or 30 small trucks. Today, 10 large trucks and 15 small trucks are used for this time. The remaining 8 tons have not been transported away. How many tons are there in this batch of cement?
在新农村建设中，区政府为南村修水泥路支持了一批水泥，用大卡车25辆，或小卡车30辆可以运完，今用大卡车10辆，小卡车15辆装这一次，还余下8吨没有运走，这批水泥一共有多少吨？
<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) * 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) * 15</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (2/5) - (1/2)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">8 / (1/10)</gadget>
<output>80</output>

<result>80</result>