Tickets for the museum are 3 yuan each, and a total of 600 tickets are sold for the two shows. How much is the average income per show?
博物馆的门票每张3元，两场共售票600张，平均每场收入多少元钱？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">600 * (3/2)</gadget>
<output>900</output>

<result>900</result>