In the formula □□*□□=2010, each of the four pieces of paper covers a number, what is the sum of the covered four numbers?
在算式□□*□□=2010中，四个小纸片各盖住了一个数字，被盖住的四个数字之和是多少？
<gadget id="calculator">3 + 0 + 6 + 7</gadget>
<output>16</output>

<result>16</result>