A car drives from place A to place B. It has traveled 20% of the whole journey, and it will arrive at the destination after another 20 kilometers. How many?
一辆汽车从甲地开往乙地，已行了全程的20%，再行20千米就到目的地，已行和未行的路程比是1：4，求甲地到乙地路程是多少？
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>