There are 2011 straight lines on the plane, of which 1005 are parallel to each other, and the other 1006 are also parallel to each other, and these two sets of straight lines are perpendicular to each other, how many right angles can they form?
平面上有2011条直线，其中1005条互相平行，另外的1006条也互相平行，并且这两组直线相互垂直，则它们可以构成多少个直角．
<gadget id="calculator">1_005 * 1_006 * 4</gadget>
<output>4_044_120</output>

<result>4_044_120</result>