The waterway from Shanghai to Wuhan is 1,200 kilometers long. A passenger ship has already traveled the entire distance (3/4) from Shanghai to Wuhan Port. How many kilometers away is it from Wuhan Port?
从上海到武汉的水路长1200千米，一艘客轮从上海开往武汉港，已经行驶了全程的(3/4)，离武汉港还有多少千米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1_200 * (1/4)</gadget>
<output>300</output>

<result>300</result>