The school sports room buys 55 basketballs, and the total cost is 990 yuan. How much is the unit price of basketball?
学校体育室购买55个篮球，一共用去990元．篮球的单价是多少元/个？
<gadget id="calculator">990 / 55</gadget>
<output>18</output>

<result>18</result>