The distance between A and B is 1200 kilometers. A car has traveled (7/8) from A to B. How many kilometers will it take to reach B?
A、B两地相距1200千米，一辆汽车从A地开往B地，已行了(7/8)，再行多少千米正好到达B地？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1_200 * (7/8)</gadget>
<output>1_050</output>

<gadget id="calculator">1_200 - 1_050</gadget>
<output>150</output>

<result>150</result>