A train departs from station A. After arriving at station B, 258 people get off and 312 people get on the train. Now there are 1248 people on board. How many people get on the train from station A?
从甲站驶出的一列火车，到乙站后有258人下车，又有312人上车，现在车上共有1248人．从甲站上车的有多少人？
<gadget id="calculator">1_248 - 312</gadget>
<output>936</output>

<gadget id="calculator">936 + 258</gadget>
<output>1_194</output>

<result>1_194</result>