Xiao Ming is running an 800-meter race. You have already run the whole distance (3/4), how many meters do you have to run to reach the finish line?
小明正在进行800米赛跑．已经跑了全程的(3/4)，还要跑多少米才能到达终点？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">800 * (1/4)</gadget>
<output>200</output>

<result>200</result>