Arrange five consecutive natural numbers in descending order. The average of the first three numbers is 45, and the average of the last three numbers is 43. What is the third number in this group of numbers?
把五个连续的自然数从大到小排列，前三个数的平均数是45，后三个数的平均数是43，这组数中的第三个数是多少．
<gadget id="calculator">45 * 3</gadget>
<output>135</output>

<gadget id="calculator">43 * 3</gadget>
<output>129</output>

<gadget id="calculator">135 + 129</gadget>
<output>264</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">264 / 6</gadget>
<output>44</output>

<result>44</result>