(1/5) of a wire is 25 meters, how many meters is its (2/5), 45 meters account for ((())/(())) of this rope.
一根铁丝的(1/5)是25米，它的(2/5)是多少米，45米占这根绳子的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / (1/5)</gadget>
<output>125</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">125 * (2/5)</gadget>
<output>50</output>

<result>50</result>