There are 8 numbers and their average is 18. After removing one number, the average of the remaining 7 numbers is 19; after removing another number, the average of the remaining 6 numbers is 20. What is the product of the two numbers removed.
有8个数，它们的平均数是18．去掉一个数后，剩下7个数的平均是19；再去掉一个数后，剩下的6个数的平均数是20．去掉的两个数的乘积是多少．
<gadget id="calculator">18 * 8</gadget>
<output>144</output>

<gadget id="calculator">19 * 7</gadget>
<output>133</output>

<gadget id="calculator">144 - 133</gadget>
<output>11</output>

<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<gadget id="calculator">133 - 120</gadget>
<output>13</output>

<gadget id="calculator">11 * 13</gadget>
<output>143</output>

<result>143</result>