The school organized an autumn outing for the students. The fourth grade went to three classes with 45 students in each class, and the fifth grade went to 148 students. How many people went to the fourth and fifth grades?
学校组织学生秋游，四年级去了3个班，每班45人，五年级去了148人．四年级和五年级一共去了多少人？
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">135 + 148</gadget>
<output>283</output>

<result>283</result>