A rectangle is 20 cm long and 1/4 wide as long, what is the perimeter of the rectangle in cm?
一个长方形，长20厘米，宽是长的(1/4)，这个长方形的周长是多少厘米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>