A car has traveled the entire distance (3/7) from A to B, and the distance traveled by B is the remaining distance.
一辆汽车从甲地去乙地，已行了全程的(3/7)，乙行的路程是剩下路程的多少．
<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>