It takes 4 hours for a car to deliver goods at a distance of 220 kilometers. How many kilometers does it travel on average per hour?
一辆小轿车要到220千米处送物品，往返共用了4小时，平均每小时行多少千米？
<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">220 * (1/2)</gadget>
<output>110</output>

<result>110</result>