Naughty uses a ribbon to form a rectangle with a length of 6 decimeters and a width of 4 decimeters, and then encloses it into a square. What is the side length of the square?
淘气用一根彩带先围成一个长6分米，宽4分米的长方形，再把它改围成一个正方形，正方形的边长是多少？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 * (1/2)</gadget>
<output>5</output>

<result>5</result>