The area of a rectangle is equal to the area of a square with side length 10 decimeters. If the length of the rectangle is 20 decimeters, what is the width in decimeters?
一个长方形的面积与边长为10分米的正方形面积相等．如果长方形的长是20分米，求宽是多少分米？
<gadget id="calculator">10 / 20</gadget>
<output>1/2 = around 0.5</output>

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

<result>5</result>