Cars A and B start at the same time from two places 873 kilometers apart, drive towards each other, and meet each other after 4.5 hours. It is known that car A is 20 kilometers slower than car B per hour, how many kilometers per hour does car B travel?
甲、乙两车从相距873千米的两地同时出发，相向而行，经过4.5小时相遇．已知甲车每小时比乙车慢20千米，乙车每小时行多少千米？
<gadget id="calculator">873 / 4.5</gadget>
<output>194</output>

<gadget id="calculator">194 + 20</gadget>
<output>214</output>

<gadget id="calculator">214 / 2</gadget>
<output>107</output>

<result>107</result>