Among 100 passengers, there are 75 people who understand French, 83 people who understand English, 65 people who understand Japanese, 50 people who understand three languages, and 10 people who do not understand three languages, so how many people understand two languages ?
100位旅客中，有75人懂法语，83人懂英语，65人懂日语，懂三种语言的有50人，三种语言都不懂的有10人，那么懂两种语言的有几人？
<gadget id="calculator">75 + 83 + 65</gadget>
<output>223</output>

<gadget id="calculator">100 - 10</gadget>
<output>90</output>

<gadget id="calculator">50 * 2</gadget>
<output>100</output>

<gadget id="calculator">223 - 90 - 100</gadget>
<output>33</output>

<result>33</result>