A batch of supporting materials, if shipped by 8 large trucks, can be shipped in 3 days, if shipped by 5 small trucks, 75% of the whole can be shipped in 8 days, currently shipped by 3 large trucks and 4 small trucks , How many days can it be shipped?
一批拥军物资，如用8辆大卡车装运，3天可运完，如用5辆小卡车装运，8天可运完全部的75%，现用3辆大卡车、4辆小卡车装运，几天可以运完？
<gadget id="calculator">5 / 40</gadget>
<output>1/8 = around 0.125</output>

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

<result>8</result>