(4/5) of x meters is 200 meters, what is x equal to?
x米的(4/5)是200米，x等于多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 / (4/5)</gadget>
<output>250</output>

<result>250</result>