Uncle Liu brought 800 yuan to buy fertilizer. I bought 16 bags of chemical fertilizer and left 80 yuan. What is the price of each bag of chemical fertilizer?
刘叔叔带800元买化肥．买了16袋化肥，剩下80元，每袋化肥的价钱是多少？
<gadget id="calculator">800 - 80</gadget>
<output>720</output>

<gadget id="calculator">720 / 16</gadget>
<output>45</output>

<result>45</result>