The average height of four fourth-grade students is 1.43 meters, and the average height of three third-grade students is 1.36 meters. What is the average height of these seven students?
四个四年级学生的平均身高是1.43米，三个三年级学生的平均身高是1.36米，这七个学生的平均身高是多少米？
<gadget id="calculator">1.43 * 4</gadget>
<output>5.72</output>

<gadget id="calculator">1.36 * 3</gadget>
<output>4.08</output>

<gadget id="calculator">5.72 + 4.08</gadget>
<output>9.8</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">9.8 / 7</gadget>
<output>1.4</output>

<result>1.4</result>