There are 80 tons of yellow sand on the pier to be transported to the construction site. Large trucks can only transport 8 tons each time, and it costs 100 yuan to transport one truck; small trucks can only transport 5 tons each time, and it costs 80 yuan to transport one truck. Which car is cheaper? How much can it be cheaper in total?
码头上有80吨黄沙要运往工地．大卡车每次只能运8吨，运一车要100元；小卡车每次只能运5吨，运一车要80元．用哪种车运便宜？一共能便宜多少元？
<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<gadget id="calculator">16 * 80</gadget>
<output>1_280</output>

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

<gadget id="calculator">10 * 100</gadget>
<output>1_000</output>

<gadget id="calculator">1_280 - 1_000</gadget>
<output>280</output>

<result>280</result>