Xiaoyao and her father and mother go to a certain place for sightseeing. The one-way ticket is 34.5 yuan per person, and each ticket is 42.5 yuan. How much is the ticket and round-trip transportation for Xiaoyao's family?
小瑶和爸爸、妈妈去某地旅游参观，单程车票每人34.5元，门票每张42.5元．小瑶全家此次旅游的门票和往返交通费共需多少元？
<gadget id="calculator">34.5 * 3 * 2</gadget>
<output>207</output>

<gadget id="calculator">42.5 * 3</gadget>
<output>127.5</output>

<gadget id="calculator">207 + 127.5</gadget>
<output>334.5</output>

<result>334.5</result>