Xiao Ming and his two children take turns to play big ping pong balls on a table tennis table. They played for 1 hour, how many minutes did each person play on average?
小明和他的两个小朋友轮流在一张乒乓球桌上大乒乓球．他们打了1小时，平均每个人打了多少分钟．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<result>40</result>