Guangming Primary School donated books to students in mountainous areas. The fifth grade donated 248 books. The fifth grade donated 8 books twice as much as the fourth grade. How many books were donated by the fourth grade?
光明小学为山区同学捐书，五年级捐248本，五年级捐的是四年级的2倍多8本，四年级捐多少本？
<gadget id="calculator">248 - 8</gadget>
<output>240</output>

<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<result>120</result>