The two ships, A and B, carry a total of 623 passengers. If the number of passengers on ship A increases by 34, and the number of passengers on ship B decreases by 57, then both ships have the same number of passengers. What is the original number of passengers on ship A?
甲乙两船共载客623人，若甲船增加34人，乙船减少57人，这时两船乘客同样多，甲船原有乘客多少人．
<gadget id="calculator">34 + 57</gadget>
<output>91</output>

<gadget id="calculator">623 - 91</gadget>
<output>532</output>

<gadget id="calculator">532 / 2</gadget>
<output>266</output>

<result>266</result>