A road has been built for 600 meters, and it is shorter (1/4) than the unbuilt one. How long is this road?
一条路已修了600米，已修的比未修的短(1/4)，这条路有多长？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">600 / (3/4)</gadget>
<output>800</output>

<gadget id="calculator">800 + 600</gadget>
<output>1_400</output>

<result>1_400</result>