A class of 48 students visited the popular science exhibition. The ticket office stipulates that each ticket for 1 person is 10 yuan, and each ticket for 10 people is 70 yuan. How much do they need at least.
某班48名学生参观科普展览．售票处规定，门票1人券每张10元，10人券每张70元．他们至少需要多少元．
<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<result>350</result>