An express train travels from A to B, and a slow train travels from B to A. The two trains start at the same time. The speed of the express train is 80 kilometers per hour. After 4 hours, the two trains meet. After meeting, the express train arrives at B after 3 hours. , at this time, how many kilometers is the slow car away from Jiadi?
一辆快车从甲地到乙地，一辆慢车从乙地到甲地，两车同时出发，快车速度是每小时80千米，经过4小时两车相遇，相遇后快车经过3小时到达乙地，此时，慢车离甲地还有多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">20 * 7</gadget>
<output>140</output>

<result>140</result>