A and B start from two places at the same time and walk towards each other. A walks 80 meters per minute, and B walks 70 meters per minute. The two meet at a distance of 50 meters from the midpoint of the two places. The distance between the two places is How much rice.
甲、乙两人同时从两地出发，相向而走，甲每分钟走80米，乙每分钟走70米，两人在距离这两地中点50米处相遇，两地之间的距离是多少米．
<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">80 - 70</gadget>
<output>10</output>

<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<gadget id="calculator">80 + 70</gadget>
<output>150</output>

<gadget id="calculator">10 * 150</gadget>
<output>1_500</output>

<result>1_500</result>