Car A travels at 160 kilometers per hour, and car B travels at the same speed at 20 kilometers per hour on a 210-kilometer-long ring road at the same time. Every time A catches up with him, the speed of A will decrease (1/3 ), the speed of B will increase (1/3). When the speeds of the two cars are exactly equal, how many kilometers has A traveled?
甲车以每小时160千米，乙车以每小时20千米的度在长210千米的环形公路上同时同向同地出发，每当甲追上一次，甲速就减少(1/3)，乙速就增加(1/3)，在两车速度正好相等的时候，甲车行了多少千米？
<gadget id="calculator">160 - 20</gadget>
<output>140</output>

<gadget id="calculator">210 / 140</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 160</gadget>
<output>240</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">21 / 8</gadget>
<output>21/8 = around 2.625</output>

<gadget id="calculator">160 * (2/3) * (21/8)</gadget>
<output>280</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">160 * (2/3) * (2/3)</gadget>
<output>640/9 = around 71.111111</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">20 * (4/3) * (4/3)</gadget>
<output>320/9 = around 35.555556</output>

<gadget id="calculator">(640/9) - (320/9)</gadget>
<output>320/9 = around 35.555556</output>

<gadget id="calculator">210 / (320/9)</gadget>
<output>189/32 = around 5.90625</output>

<gadget id="calculator">160 * (2/3) * (2/3) * (189/32)</gadget>
<output>420</output>

<gadget id="calculator">240 + 280 + 420</gadget>
<output>940</output>

<result>940</result>