Two cars, A and B, are traveling toward each other from east and west. Car A travels 47.5 kilometers per hour, and car B travels 42.5 kilometers per hour. The two cars meet at a distance of 20 kilometers from the midpoint. How many kilometers is the distance between East and West?
甲、乙两辆汽车从东、西两地相向而行，甲车每时行47.5千米，乙车每时行42.5千米，两车在离中点20千米处相遇．东、西两地相距多少千米？
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">47.5 - 42.5</gadget>
<output>5</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<gadget id="calculator">47.5 + 42.5</gadget>
<output>90</output>

<gadget id="calculator">8 * 90</gadget>
<output>720</output>

<result>720</result>