There are 54 students from Jinmen Road Elementary School who are going to visit the Science and Technology Museum. Ticket prices are as follows: 30 yuan for adults, 30% off for students, and 150 yuan for a group of 10 people. Please help me figure out how to buy the most economical.
金门路小学有54名学生要去参观科技馆，票价如下：成人票30元，学生票打7折，10人团体票150元，请你帮忙算一算，怎样买最省钱．
<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">6 * 150</gadget>
<output>900</output>

<result>900</result>