There are 4 classes in the third grade of a certain elementary school, with an average of 32 students in each class; there are 5 classes in the fourth grade, with an average of 34 students in each class, how many students are there in the third and fourth grades?
某小学三年级有4个班，每个班平均有32名学生；四年级有5个班，每个班平均有34名学生，三四两个年级共有多少名学生？
<gadget id="calculator">32 * 4</gadget>
<output>128</output>

<gadget id="calculator">34 * 5</gadget>
<output>170</output>

<gadget id="calculator">128 + 170</gadget>
<output>298</output>

<result>298</result>