A car travels 48 kilometers per hour, which is 0.7 kilometers more than 2.2 times that of a bicycle. How many kilometers per hour does a bicycle travel?
汽车每小时行48千米，比自行车的2.2倍还多0.7千米，自行车每小时行多少千米？
<gadget id="calculator">48 - 0.7</gadget>
<output>47.3</output>

<gadget id="calculator">47.3 / 2.2</gadget>
<output>21.5</output>

<result>21.5</result>