Two trains meet in opposite directions. The driver of car A sees car B passing by. It takes 6 seconds. It is known that car A travels 45 kilometers per hour, and car B travels 36 kilometers per hour. What is the length of car B? rice.
两列火车对开相遇，甲车上的司机看到乙车从旁边开过，共用了6秒，已知甲车每小时行45千米，乙车每小时行36千米，乙车长多少米．
<gadget id="calculator">45 * 1_000</gadget>
<output>45_000</output>

<gadget id="calculator">36 * 1_000</gadget>
<output>36_000</output>

<gadget id="calculator">45_000 + 36_000</gadget>
<output>81_000</output>

<gadget id="calculator">60 * 60</gadget>
<output>3_600</output>

<gadget id="calculator">81_000 / 3_600</gadget>
<output>45/2 = around 22.5</output>

<gadget id="calculator">(45/2) * 6</gadget>
<output>135</output>

<result>135</result>