There were originally 205 tourists on board, but 79 people disembarked after entering the port, and 128 people boarded again. How many people were there on the passenger ship when the ship sailed?
轮船上原来有205名游客，进入港口后下船了79人，又上来了128人，开船时客轮上有多少人？
<gadget id="calculator">205 - 79</gadget>
<output>126</output>

<gadget id="calculator">126 + 128</gadget>
<output>254</output>

<result>254</result>