road construction team completed a 2,400-meter-long road in three weeks. It is known that 2/3 of the full length was repaired in the first and second weeks, 1,400 meters in total in the second and third weeks, and how many meters were repaired in the second week.
一个修路队三周修完一条长2400米的路，已知第一、二周修了全长的(2/3)，第二、三周共修1400米，第二周修了多少米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2_400 * (2/3)</gadget>
<output>1_600</output>

<gadget id="calculator">1_400 - 2_400</gadget>
<output>-1_000</output>

<gadget id="calculator">1_600 + (-1_000)</gadget>
<output>600</output>

<result>600</result>