There are 6 classes in the third and fourth grades of Hope Primary School. The average number of students in each class of the third grade is 55, and the average number of students in each class of the fourth grade is 45. How many more students are there in the third grade than in the fourth grade?
希望小学三年级和四年级各有6个班，三年级平均每班有55人，四年级平均每班有45人，三年级比四年级多多少人？
<gadget id="calculator">55 - 45</gadget>
<output>10</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<result>60</result>