Hongguang Primary School has 120 students in the fourth grade, 40 fewer students in the fifth grade than twice as many as the fourth grade, and 218 students in the sixth grade. How many more students are in the sixth grade than in the fifth grade?
红光小学四年级有学生120人，五年级学生的人数比四年级对的2倍少40人，六年级有218人．六年级比五年级多多少人？
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 - 40</gadget>
<output>200</output>

<gadget id="calculator">218 - 200</gadget>
<output>18</output>

<result>18</result>