Dongyang District openly recruits primary school teachers. There are 360 applicants for Chinese and 270 teachers for mathematics. Now it is decided that every 30 people will set up a test room. How many test rooms are fewer for those who apply for mathematics than for those who apply for Chinese?
东阳区公开招聘小学教师，报考语文的都是有360人，报考数学的教师有270人．现决定每30人编一个考室，报考数学的比报考语文的少几个考室？
<gadget id="calculator">360 - 270</gadget>
<output>90</output>

<gadget id="calculator">90 / 30</gadget>
<output>3</output>

<result>3</result>