There are 6 classes in the third and fourth grades of Dongfanghong Primary School, with an average of 45 students in each class of the third grade and 55 students in each class of the fourth grade. How much less students are there in the third grade than in the fourth grade?
东方红小学三年级和四年级各有6个班，三年级平均每班45人，四年级平均每班55人，三年级比四年级少多少人？
<gadget id="calculator">55 - 45</gadget>
<output>10</output>

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

<result>60</result>