Two cars, passenger and freight, are traveling toward each other from places A and B respectively. After the passenger car travels 50 kilometers first, the freight car starts from point B. The passenger car travels 20 kilometers longer than the freight car. The speed ratio between the passenger car and the freight car is known to be 2:3, what is the distance between A and B?
客、货两车分别从甲、乙两地相向而行，客车先行了50千米后，货车从乙地出发，相遇客车比货车多行了20千米，已知客车与货车的速度比是2：3，求甲、乙两地相距多少长？
<gadget id="calculator">30 / 1</gadget>
<output>30</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">150 + 50</gadget>
<output>200</output>

<result>200</result>