The shopping mall has newly bought a batch of electronic pianos, each priced at 307 yuan. How much does it cost the band to buy 30 electronic pianos?
商场新进了一批电子琴，每台售价307元．乐队买30台电子琴一共要用多少钱？
<gadget id="calculator">307 * 30</gadget>
<output>9_210</output>

<result>9_210</result>