Teacher Liu took 800 yuan to the supermarket to buy basketball. If you bought 5 identical basketballs and left 20 yuan, what is the unit price of the basketball?
刘老师带800元去超市买篮球．买了5个同样的篮球，剩下20元，篮球的单价是多少？
<gadget id="calculator">800 - 20</gadget>
<output>780</output>

<gadget id="calculator">780 / 5</gadget>
<output>156</output>

<result>156</result>