A plane flies 720 kilometers in one hour, which is exactly 30% of the whole journey. How many kilometers will the plane fly to reach the destination?
一架飞机1小时飞行720千米，正好是全程的30%，这架飞机再飞多少千米才能到达目的地？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">720 / (3/10)</gadget>
<output>2_400</output>

<gadget id="calculator">2_400 - 720</gadget>
<output>1_680</output>

<result>1_680</result>