There are 7 numbers and their average is 1.8. After removing one number, the average of the remaining 6 numbers is 1.9. After removing one number, the average of the remaining 5 numbers is 2.0. Find the product of the two numbers removed.
有7个数，它们的平均数是1.8，去掉一个数后，剩下6个数的平均数是1.9，去掉一个数后，剩下5个数的平均数是2.0．求去掉的两个数的乘积．
<gadget id="calculator">7 * 1.8</gadget>
<output>12.6</output>

<gadget id="calculator">6 * 1.9</gadget>
<output>11.4</output>

<gadget id="calculator">12.6 - 11.4</gadget>
<output>1.2</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">11.4 - 10</gadget>
<output>1.4</output>

<gadget id="calculator">1.2 * 1.4</gadget>
<output>1.68</output>

<result>1.68</result>