There is an array, which is (1, 2, 3); (2, 6, 8); (3, 12, 15); (4, 20, 24); (5, 30, 35); (6, 42 , 48)...What is the sum of the three numbers in the 40th group.
有一列数组，依次是(1，2，3)；(2，6，8)；(3，12，15)；(4，20，24)；(5，30，35)；(6，42，48)…第40组中三个数的和是多少．
<gadget id="calculator">40 * 41</gadget>
<output>1_640</output>

<gadget id="calculator">40 + 1_640</gadget>
<output>1_680</output>

<gadget id="calculator">40 + 1_640 + 1_680</gadget>
<output>3_360</output>

<result>3_360</result>