There is a batch of goods, if 5 large trucks and 2 small trucks are used to finish the shipment, or if 2 large trucks and 8 small trucks are used to complete the shipment, if all of them are shipped by large trucks, how many trucks will be needed to complete the shipment?
有一批货物，如果用5辆大卡车和2辆小卡车正好运完，或者用2辆大卡车和8辆小卡车也正好运完，如果全用大卡车运，要几辆才能运完？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<result>6</result>