Cars A and B travel around a circular runway with a circumference of 400 kilometers. They start from the same point at the same time, run opposite each other, and meet each other in 5 hours. If the two cars speed up 10 kilometers per hour, then the meeting point is 3 kilometers away from the previous meeting point, and it is known that car B is faster than car A, how many kilometers per hour does car A travel?
甲、乙两车绕周长为400千米的环形跑道行驶，它们从同一点同时出发，相背而行，5小时相遇．如果两车每小时各加快10千米，那么相遇点距前一次相遇点3千米，已知乙车比甲车快，求原来甲车每小时行多少千米？
<gadget id="calculator">40 - 3</gadget>
<output>37</output>

<gadget id="calculator">400 / 5</gadget>
<output>80</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">400 / 100</gadget>
<output>4</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">37 / 1</gadget>
<output>37</output>

<result>37</result>