gle 1, no gap between the right edge of red rectangle and the right of rectangle 3 too, and rectangle 2 is distributed so that the empty space between rectangle 1 and rectangle 3 is the same.<br>
    3. the height of the 1, 2, 3 is the same as the height of the red rectangle.</p>
    <div id=test><div id=test01>1</div><div id=test02>2</div><div id=test03>3</div></div>
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