The distance between A and B is 360 kilometers. Two cars drive from the two places at the same time, with speeds of 40 kilometers and 50 kilometers per hour respectively. How far is the distance between the meeting point of the two cars and the midpoint of the two places?
A、B两地相距360千米，有两辆汽车从两地同时开出，速度分别是每小时40千米和50千米，两车相遇地点距两地中点多远？
<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<gadget id="calculator">40 + 50</gadget>
<output>90</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<gadget id="calculator">4 * 40</gadget>
<output>160</output>

<gadget id="calculator">180 - 160</gadget>
<output>20</output>

<result>20</result>