The distance between A and B is 244 kilometers. A and B ride electric bicycles and drive from the two places at the same time. After 4 hours, the two cars meet. A travels 28 kilometers per hour. How much does B travel per hour? km?
A、B两地相距244千米，甲、已两人骑电动车自行车同时从两地相对开出，经过4小时后两车相遇，甲车每小时行28千米，乙车每小时行多少千米？
<gadget id="calculator">244 / 4</gadget>
<output>61</output>

<gadget id="calculator">61 - 28</gadget>
<output>33</output>

<result>33</result>