The school digs a sandpit with a length of 8 meters, a width of 6 meters, and a depth of 0.5 meters. Each cubic meter of sand weighs 1.5 tons. If a car with a load capacity of 4 tons is used to transport it all at once, how many cars are needed in total?
学校挖一个沙坑，长8米，宽6米，深0.5米，每立方米沙子重1.5吨，如果用载重量为4吨的汽车一次运完，一共需要多少辆汽车？
<gadget id="calculator">1.5 / 4</gadget>
<output>0.375</output>

<gadget id="calculator">8 * 6 * 0.5 * 0.375</gadget>
<output>9</output>

<result>9</result>