After two cars A and B drive at the same time for 3 hours, A travels 3.3 kilometers longer than B. It is known that A travels 87 kilometers per hour. What is the speed of B?
甲乙两辆汽车同时开出3小时后，甲比乙多走3.3千米，已知甲每小时行驶87千米，乙的速度是多少？
<gadget id="calculator">3.3 / 3</gadget>
<output>1.1</output>

<gadget id="calculator">87 - 1.1</gadget>
<output>85.9</output>

<result>85.9</result>