A highway is 600 kilometers long, and (4/5) of it is paved with asphalt, how many meters are left unpaved.
一条公路长600千米，将其(4/5)铺上柏油，还剩多少米没有铺．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">600 * (4/5)</gadget>
<output>480</output>

<gadget id="calculator">600 - 480</gadget>
<output>120</output>

<result>120</result>