During the summer camp, 48 students visited the popular science exhibition. The ticket office stipulates that tickets for one person are 10 yuan, and tickets for ten people are 70 yuan each. How much do they buy tickets at least?
在夏令营活动中，48位学生参观科普展览．售票处规定，门票一人券10元，十人券每张70元．他们购买门票至少要多少元．
<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<result>350</result>