Xiao Zhang, Xiao Wang, and Xiao Li's speeds are 100 meters, 80 meters and 70 meters per minute respectively. Xiao Zhang and Xiao Wang travel from A to B, and Xiao Li travels from B to A. The three of them set off at the same time. If Xiao Zhang and Xiao Li meet, they will be 300 meters away from Xiao Wang. So what is the distance in meters from A to B?
小张、小王、小李的不行速度分别是每分钟100米、80米和70米，小张和小王从甲地到乙地，小李是从乙地到甲地．他们三人同时出发，如果小张与小李相遇时，他们距离小王300米．那么从甲地到乙地的距离是多少米．
<gadget id="calculator">100 - 80</gadget>
<output>20</output>

<gadget id="calculator">300 / 20</gadget>
<output>15</output>

<gadget id="calculator">100 + 70</gadget>
<output>170</output>

<gadget id="calculator">15 * 170</gadget>
<output>2_550</output>

<result>2_550</result>